@proceedings {612, title = {THz Transmission through Submillimeter Apertures}, year = {2020}, month = {11/2020}, address = {Buffalo NY}, abstract = {
Terahertz near-field microspectroscopy is emerging as an essential tool for characterization of novel materials and biomolecules. It is important to ensure the near field geometry used does not introduce spectral artifacts. For example, many scanning techniques can be strongly influenced by the interaction between the scattering tip and the sample. Here we examine the spectroscopic effects of a 200 μm diameter aperture for THz near-field measurements. We use HFSS to model free-space transmission through samples with resonant absorbance as a function of sample thickness, lateral sample width, and aperture diameter. We examine the transmitted power and spectral fidelity for coupling of transmitted THz light onto a detector. These studies inform corrective post-measurement analysis algorithms and design of near-field detection systems.
}, doi = {10.1109/IRMMW-THz46771.2020.9370923}, url = {https://ieeexplore.ieee.org/document/9370923}, author = {LaFave, T. and Lee, A. and Kao, T.-Y. and Markelz, A.} } @proceedings {185, title = {Tunable Compact Narrow Band THz Sources for Frequency Domain THz Anisotropic Spectroscopy}, volume = {10983}, year = {2019}, note = {ISI Document Delivery No.: BN5PJ
Times Cited: 0
Cited Reference Count: 17
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George, D. K. LaFave, T. J. Markelz, A. G. Mcnee, Ian Tekavec, Patrick Kozlov, Vladimir Schunemann, Peter
LaFave, Tim/0000-0003-2925-8657
NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCESUnited States Department of Health \& Human ServicesNational Institutes of Health (NIH) - USANIH National Institute of General Medical Sciences (NIGMS) [R41GM125486] Funding Source: NIH RePORTER; NIGMS NIH HHSUnited States Department of Health \& Human ServicesNational Institutes of Health (NIH) - USANIH National Institute of General Medical Sciences (NIGMS) [R41 GM125486] Funding Source: Medline
0277-786x
1098311}, month = {Apr 15-17}, publisher = {Spie-Int Soc Optical Engineering}, address = {Baltimore, MD}, abstract = {

We demonstrate frequency domain THz anisotropy signature detection for protein crystal models using newly developed compact tunable narrow band THz sources based on Orientation Patterned Gallium Phosphide for turn-key spectroscopic systems.

}, keywords = {anisotropy, biomolecules, femtosecond, optical rectification, orientation patterned gallium phosphide, Terahertz, THz generation}, isbn = {978-1-5106-2632-4}, doi = {https://doi.org/10.1117/12.2519878}, author = {George, D. K. and LaFave, T. J. and Markelz, A. G. and McNee, I. and Tekavec, P. and Kozlov, V. and Schunemann, P.} } @conference {305, title = {Tunable narrow band sources for anisotropic THz spectroscopy}, booktitle = {APS S23-002}, year = {2019}, month = {02/2019}, url = {https://meetings.aps.org/Meeting/MAR19/Session/S23.2}, author = {George, D. K. and McNee, I. and Tekavec, P. and Kozlov, V. and Schunemann, P. and Markelz, A. G.} } @proceedings {236, title = {Tunable narrowband THz generation in orientation patterned gallium phosphide for THz anisotropy identification}, volume = {10902}, year = {2019}, note = {ISI Document Delivery No.: BM9XB
Times Cited: 2
Cited Reference Count: 8
Cited References:
Fejer M. M., 2013, ANTIPHASE DOMAIN ANN, P258
Jepsen PU, 2011, LASER PHOTONICS REV, V5, P124, DOI 10.1002/lpor.201000011
Lee YS, 2000, APPL PHYS LETT, V76, P2505, DOI 10.1063/1.126390
Niessen K. A., BIOPHYSICAL J, V112, P933
PARSONS DF, 1971, APPL OPTICS, V10, P1683
Singh R., 2013, MODULATED ORIENTATIO
Tassev V., 2013, SPIE LASE, P9
Tekavec P., 2017, FRONTIERS OPTICS 201
McNee, Ian Tekavec, Patrick Kozlov, Vladimir Markelz, A. G. George, D. K. Schunemann, Peter
Proceedings Paper
Conference on Nonlinear Frequency Generation and Conversion - Materials and Devices XVIII
Feb 05-07, 2019
San Francisco, CA
Spie
1000 20th st, po box 10, bellingham, wa 98227-0010 usa
0277-786x
Unsp 1090218}, publisher = {Spie-Int Soc Optical Engineering}, address = {Bellingham}, abstract = {

We demonstrate tunable narrowband THz generation by optical rectification of a femtosecond pulse in Orientation Patterned Gallium Phosphide. Center frequencies of 0.9 - 3.8 THz with average power up to 15 mu W were achieved using a 1.064 mu m fiber laser for the pump laser. Biomolecular characterization for an early application of this system is also shown in this work by anisotropic spectroscopic signature detection of molecular crystals in the THz region.

}, keywords = {anisotropy, biomolecules, femtosecond, optical rectification, orientation patterned gallium phosphide, Terahertz, THz generation}, isbn = {978-1-5106-2447-4}, doi = {https://doi.org/10.1117/12.2510522}, author = {McNee, I. and Tekavec, P. and Kozlov, V. and Markelz, A. G. and George, D. K. and Schunemann, P.}, editor = {Schunemann, P. G. and Schepler, K. L.} } @proceedings {182, title = {Terahertz Light Fingerprints Biomolecular Dynamics}, year = {2018}, pages = {SW3D. 5}, publisher = {Optical Society of America}, doi = {https://doi.org/10.1364/CLEO_SI.2018.SW3D.5}, author = {Deng, Yanting and Xu, Mengyang and Niessen, Katherine A and George, Deepu Koshy and Markelz, Andrea G} } @proceedings {226, title = {THz Anisotropy Identification using Tunable Compact Narrow Band THz Sources}, year = {2018}, note = {ISI Document Delivery No.: BL3GO
Times Cited: 0
Cited Reference Count: 6
Cited References:
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Lin A., 2013, ANTIPHASE DOMAIN ANN, P258
Niessen KA, 2017, BIOPHYS J, V112, P933, DOI 10.1016/j.bpj.2016.12.049
Tassev V., 2013, SPIE LASE, P9
Tekavec P., 2017, FRONTIERS OPTICS 201
George, D. K. Markelz, A. G. Mcnee, Ian Tekavec, Patrick Kozlov, Vladimir Schunemann, Peter
Irmmw-thz
Proceedings Paper
43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Sep 09-14, 2018
Nagoya, JAPAN
IEEE Microwave Theory \& Tech Soc, TeraTech, JSPS, JSIR, Japan Soc Appl Phys, IEEJ, CSJ, AIP, APL Photon, AIP, Journal Appl Phys, EiC, SPSJ, Terahertz Syst Consortium, AICHI, Nagoya Convent \& Visitors Bur, ADVANTEST CORP, AmTechs Corp, Menlo Systems GmbH, Nippo Precigion Co Ltd, TeraMetrix LLC Div Luna, ATN Japan LTD, DAHENG NEW EPOCH TECHNOL INC, FEMTO Dev Inc, KYOWA FINTECH Co Ltd, Spectra Design Ltd, TeraView Ltd, TYDEX LLC, Virginia Diodes Inc, PNP, Tydex Res \& Ind Opt, Femtowave, Kyowa Fine Tech Co Ltd, Daheng Opt
345 e 47th st, new york, ny 10017 usa
2162-2027}, publisher = {Ieee}, address = {New York}, abstract = {

We demonstrate THz anisotropy signature determination of a protein crystal model using newly developed compact tunable narrow band THz sources for turn-key spectroscopic systems for the bio molecular community.

}, isbn = {978-1-5386-3809-5}, doi = {https://doi.org/10.1109/IRMMW-THz.2018.8510291}, author = {George, D. K. and Markelz, A. G. and McNee, I. and Tekavec, P. and Kozlov, V. and Schunemann, P.} } @conference {287, title = {Temperature dependence of phonons in photosynthesis proteins}, booktitle = {APS 2017 S4.003}, year = {2017}, url = {http://meetings.aps.org/link/BAPS.2017.MAR.S4.3}, author = {Xu, M. and Myles, D. and Blankenship, R. and Markelz, A.} } @article {255, title = {Terahertz optical measurements of correlated motions with possible allosteric function}, journal = {Biophysical Reviews}, volume = {7}, number = {2}, year = {2015}, note = {19}, month = {2015-Jun}, pages = {201-216}, abstract = {

A suggested mechanism for allosteric response is the distortion of the energy landscape with agonist binding changing the protein structure{\textquoteright}s access to functional configurations. Intramolecular vibrations are indicative of the energy landscape and may have trajectories that enable functional conformational change. Here, we discuss the development of an optical method to measure the intramolecular vibrations in proteins, namely, crystal anisotropy terahertz microscopy, and the various approaches which can be used to identify the spectral data with specific structural motions.

}, isbn = {1867-2450}, doi = {https://dx.doi.org/10.1007\%2Fs12551-015-0168-4}, author = {Niessen, Katherine A. and Xu, Mengyang and Markelz, A. G.} } @article {290, title = {Terahertz Optical Measurements of Correlated Motions with Possible Allosteric Function}, journal = {Biophysical Journal}, volume = {7}, year = {2015}, month = {04/2015}, pages = {201{\textendash}216}, doi = {10.1007/s12551-015-0168-4}, url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5425745/}, author = {Niessen, K. A. and Xu, M. and Markelz, A. G.} } @inbook {301, title = {Terahertz Spectroscopy of Liquids and Biomolecules}, booktitle = {Terahertz Spectroscopy and Imaging}, year = {2013}, pages = {229-250}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, chapter = {9}, address = {Berlin-Heidelberg}, doi = {10.1007/978-3-642-29564-5_9}, author = {George, D. K. and Markelz, A. G.} } @inbook {302, title = {Terahertz / Far Infrared Spectroscopy: Protein Dynamics}, booktitle = {Encyclopedia of Biophysics}, volume = {ed. Gordon C. K. Roberts}, year = {2012}, publisher = {Springer}, organization = {Springer}, author = {Markelz, A. G.} } @article {186, title = {Terahertz magneto-optical polarization modulation spectroscopy}, journal = {JOSA BJOSA B}, volume = {29}, number = {6}, year = {2012}, pages = {1406-1412}, isbn = {1520-8540}, doi = {https://doi.org/10.1364/JOSAB.29.001406}, author = {George, Deepu K and Stier, Andreas V and Ellis, Chase T and McCombe, Bruce D and {\v C}erne, John and Markelz, Andrea G} } @article {221, title = {Terahertz Response and Colossal Kerr Rotation from the Surface States of the Topological Insulator Bi2Se3}, journal = {Physical Review Letters}, volume = {108}, number = {8}, year = {2012}, note = {ISI Document Delivery No.: 896NY
Times Cited: 164
Cited Reference Count: 35
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George, Deepu/J-9882-2014; Aguilar, Rolando Valdes/A-6637-2012; Liu, Wei/H-5999-2012; Wu, Liang/C-8715-2015
George, Deepu/0000-0003-0021-0705; Aguilar, Rolando Valdes/0000-0002-4321-4792; Wu, Liang/0000-0003-1696-7809; Markelz, Andrea/0000-0003-0443-4319
"Institute for Quantum Matter" DOE [DE-FG02-08ER46544]; Gordon and Betty Moore FoundationGordon and Betty Moore Foundation; NSFNational Science Foundation (NSF) [MRI-R2 0959989, DMR-1006078, DMR-0845464]; IAMDN of Rutgers University; ONROffice of Naval Research [N000140910749]; Division Of Materials ResearchNational Science Foundation (NSF)NSF - Directorate for Mathematical \& Physical Sciences (MPS) [0845464] Funding Source: National Science Foundation
The authors would like to thank H. D. Drew, J. Hancock, Z. Hao, G. S. Jenkins, A. Kuzmenko, A. MacDonald, N. A. Mecholsky, A. J. Pearson, O. Tchernyshyov, W-K. Tse, and Y. Wan for helpful discussions and/or correspondences. Support for the measurements at JHU was provided under the auspices of the "Institute for Quantum Matter" DOE DE-FG02-08ER46544 and the Gordon and Betty Moore Foundation. The work at UB was supported by NSF MRI-R2 0959989 and NSF DMR-1006078. The work at Rutgers was supported by IAMDN of Rutgers University, NSF DMR-0845464 and ONR N000140910749.
166
3
157
Amer physical soc
College pk}, month = {Feb}, pages = {5}, type = {Article}, abstract = {

We report the THz response of thin films of the topological insulator Bi2Se3. At low frequencies, transport is essentially thickness independent showing the dominant contribution of the surface electrons. Despite their extended exposure to ambient conditions, these surfaces exhibit robust properties including narrow, almost thickness-independent Drude peaks, and an unprecedentedly large polarization rotation of linearly polarized light reflected in an applied magnetic field. This Kerr rotation can be as large as 65 degrees and can be explained by a cyclotron resonance effect of the surface states.

}, keywords = {bi2te3, Physics}, isbn = {0031-9007}, doi = {https://doi.org/10.1103/physrevlett.108.087403}, author = {Aguilar, R. V. and Stier, A. V. and Liu, W. and Bilbro, L. S. and George, D. K. and Bansal, N. and Wu, L. and Cerne, J. and Markelz, A. G. and Oh, S. and Armitage, N. P.} } @article {183, title = {Terahertz spectroscopic analysis of peptides and proteins}, journal = {Journal of Infrared, Millimeter, and Terahertz Waves}, volume = {33}, number = {10}, year = {2012}, pages = {973-988}, isbn = {1866-6892}, doi = {https://doi.org/10.1007/s10762-012-9915-9}, author = {Falconer, Robert J and Markelz, Andrea G} } @article {195, title = {Terahertz dielectric sensitivity to biomolecular structure and function}, journal = {IEEE Journal of Selected Topics in Quantum Electronics}, volume = {14}, number = {1}, year = {2008}, pages = {180-190}, isbn = {1077-260X}, doi = {https://doi.org/10.1109/JSTQE.2007.913424}, author = {Markelz, Andrea G} } @article {243, title = {Terahertz response of quantum point contacts}, journal = {Applied Physics LettersApplied Physics LettersApplied Physics Letters}, volume = {92}, number = {22}, year = {2008}, note = {ISI Document Delivery No.: 310KL
Times Cited: 25
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27

6
Amer inst physics
Melville
1077-3118}, month = {Jun}, pages = {3}, type = {Article}, abstract = {

We measure a clear terahertz response in the low-temperature conductance of a quantum point contact at 1.4 and 2.5 THz. We show that this photoresponse does not arise from a heating effect, but that it is instead excellently described by a classical model of terahertz-induced gate-voltage rectification. This effect is distinct from the rectification mechanisms that have been studied previously, being determined by the phase-dependent interference of the source drain and gate voltage modulations induced by the terahertz field. (C) 2008 American Institute of Physics.

}, keywords = {detector, devices, field-effect transistors, Physics, plasma-waves, radiation, resonant detection, subterahertz, transport}, isbn = {0003-6951}, doi = {https://doi.org/10.1063/1.2938416}, author = {Song, J. W. and Kabir, N. A. and Kawano, Y. and Ishibashi, K. and Aizin, G. R. and Mourokh, L. and Reno, J. L. and Markelz, A. G. and Bird, J. P.} } @article {222, title = {Terahertz spectroscopy of bacteriorhodopsin and rhodopsin: Similarities and differences}, journal = {Biophysical Journal}, volume = {94}, number = {8}, year = {2008}, note = {ISI Document Delivery No.: 280IP
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Balu, R. Zhang, H. Zukowski, E. Chen, J. -Y. Markelz, A. G. Gregurick, S. K.
Zhang, Hailiang/F-8325-2010
Markelz, Andrea/0000-0003-0443-4319
52

27
Cell press
Cambridge
1542-0086}, month = {Apr}, pages = {3217-3226}, type = {Article}, abstract = {

We studied the low-frequency terahertz spectroscopy of two photoactive protein systems, rhodopsin and bacteriorhodopsin, as a means to characterize collective low-frequency motions in helical transmembrane proteins. From this work, we found that the nature of the vibrational motions activated by terahertz radiation is surprisingly similar between these two structurally similar proteins. Specifically, at the lowest frequencies probed, the cytoplasmic loop regions of the proteins are highly active; and at the higher terahertz frequencies studied, the extracellular loop regions of the protein systems become vibrationally activated. In the case of bacteriorhodopsin, the calculated terahertz spectra are compared with the experimental terahertz signature. This work illustrates the importance of terahertz spectroscopy to identify vibrational degrees of freedom which correlate to known conformational changes in these proteins.

}, keywords = {Biophysics, bovine rhodopsin, conformational-changes, elastic, frequency normal-modes, light activation, molecular-dynamics simulation, neutron-scattering, protein-coupled receptors, transmembrane helices, vibrational-modes, wild-type}, isbn = {0006-3495}, doi = {10.1529/biophysj.107.105163}, author = {Balu, R. and Zhang, H. and Zukowski, E. and Chen, J. Y. and Markelz, A. G. and Gregurick, S. K.} } @article {223, title = {Terahertz dielectric assay of solution phase protein binding}, journal = {Applied Physics Letters}, volume = {90}, number = {24}, year = {2007}, note = {ISI Document Delivery No.: 179QR
Times Cited: 51
Cited Reference Count: 9
Cited References:
Balog E, 2004, PHYS REV LETT, V93, DOI 10.1103/PhysRevLett.93.028103
Brucherseifer M, 2000, APPL PHYS LETT, V77, P4049, DOI 10.1063/1.1332415
Chen JY, 2005, PHYS REV E, V72, DOI 10.1103/PhysRevE.72.040901
Fear G, 2007, PHARMACOL THERAPEUT, V113, P354, DOI 10.1016/j.pharmthera.2006.09.001
Heugen U, 2006, P NATL ACAD SCI USA, V103, P12301, DOI 10.1073/pnas.0604897103
Knab J, 2006, BIOPHYS J, V90, P2576, DOI 10.1529/biophysj.105.069088
LEHRER SS, 1967, J BIOL CHEM, V242, P4644
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Xu J, 2006, PROTEIN SCI, V15, P1175, DOI 10.1110/ps.062073506
Chen, Jing-Yin Knab, J. R. Ye, Shuji He, Yunfen Markelz, A. G.
Ye, Shuji/B-4479-2010
Markelz, Andrea/0000-0003-0443-4319
53
1
42
Amer inst physics
Melville
1077-3118}, month = {Jun}, pages = {3}, type = {Article}, abstract = {

The authors demonstrate a method for rapid determination of protein-ligand binding on solution phase samples using terahertz dielectric spectroscopy. Measurements were performed using terahertz time domain spectroscopy on aqueous solutions below the liquid-solid transition for water. Small ligand binding sensitivity was demonstrated using triacetylglucosamine and hen egg white lysozyme with a decrease in dielectric response with binding. The magnitude of the change increases with frequency. (c) 2007 American Institute of Physics.

}, keywords = {dynamics, lysozyme, Physics, spectroscopy, water}, isbn = {0003-6951}, doi = {10.1063/1.2748852}, author = {Chen, J. Y. and Knab, J. R. and Ye, S. J. and He, Y. F. and Markelz, A. G.} } @article {191, title = {Terahertz measurements of protein relaxational dynamics}, journal = {Proceedings of the IEEE}, volume = {95}, number = {8}, year = {2007}, pages = {1605-1610}, isbn = {0018-9219}, doi = {10.1109/JPROC.2007.898906}, author = {Knab, Joseph R and Chen, Jing-Yin and He, Yunfen and Markelz, Andrea G} } @article {229, title = {Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems}, journal = {Applied Physics Letters}, volume = {89}, number = {13}, year = {2006}, note = {ISI Document Delivery No.: 089JE
Times Cited: 18
Cited Reference Count: 16
Cited References:
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Kabir, N. A. Yoon, Y. Knab, J. R. Chen, J. -Y. Markelz, A. G. Reno, J. L. Sadofyev, Y. Johnson, S. Zhang, Y. -H. Bird, J. P.
Bird, Jonathan P/G-4068-2010
Bird, Jonathan P/0000-0002-6966-9007; Markelz, Andrea/0000-0003-0443-4319
18

15
Amer inst physics
Melville}, month = {Sep}, pages = {3}, type = {Article}, abstract = {

Frequency-dependent complex conductivity of high-mobility GaAs and InAs two-dimensional-electron-gas (2DEG) systems is studied by terahertz time domain spectroscopy. Determining the momentum relaxation time from a Drude model, the authors find a lower value than that from dc measurements, particularly at high frequencies/low temperatures. These deviations are consistent with the ratio tau(t)/tau(q,) where tau(q) is the full scattering time. This suggests that small-angle scattering leads to weaker heating of 2DEGs at low temperatures than expected from dc mobilit9y. (c) 2006 American Institute of Physics.

}, keywords = {field-effect transistors, photoconductivity, Physics, plasma-waves, radiation, resonant detection, subterahertz}, isbn = {0003-6951}, doi = {10.1063/1.2357605}, author = {Kabir, N. A. and Yoon, Y. and Knab, J. R. and Chen, J. Y. and Markelz, A. G. and Reno, J. L. and Sadofyev, Y. and Johnson, S. and Zhang, Y. H. and Bird, J. P.} } @proceedings {196, title = {Tagless and universal biosensor for point detection of pathogens}, volume = {5411}, year = {2004}, pages = {182-186}, publisher = {International Society for Optics and Photonics}, doi = {https://doi.org/10.1117/12.563613}, author = {Markelz, Andrea G and Knab, Joseph R and Chen, Jing-Yin and {\v C}erne, John and Cox, William A} } @proceedings {310, title = {Terahertz measurements of the Photoactive Protein Bacteriorhodopsin mutant D96N: M and P states}, volume = {826}, year = {2004}, pages = {pages261{\textendash}267}, address = {Warrendale, PA}, abstract = {

We use terahertz (THz) spectroscopy as a biomaterials characterization tool. Previously we have shown a strong contrast between the THz dielectric response for wild type (WT) and D96N mutant of bacteriorhodopsin. In those studies we observed a large increase in the THz absorbance of WT with excitation to thermally captured photo-intermediates whereas no such increase in absorbance was observed for the mutant D96N. These results suggest that the THz response is sensitive to structural changes and relative flexibility of biomolecules. However the photo-intermediate populations of the WT and D96N samples were not equivalent in those measurements. While the WT samples had relaxed (bR), M and P state intermediates present, the D96N samples had only bR and M states. Here we present terahertz absorbance measurements of D96N as a function of M and P state populations at room temperature. The THz response is constant for intermediate states populations up to 23\% M state and up to 30\% P state. These results verify that there is a fundamental difference in the conformational dynamics as measured by THz dielectric response for a single residue mutation.

}, doi = {10.1557/PROC-826-V2.6}, author = {Chen, C.-Y. and Knab, J. R. and Cerne, J. and Hillebrecht, J. R. and Birge, R. R. and Markelz, A. G.} } @proceedings {312, title = {Thz Dielectric Response As A Function Of Protein Hydration: Intramolecular Coupling Contribution}, year = {2004}, month = {10/2004}, address = {Philadelphia, PA}, author = {Markelz, A. G. and Chen, J.-Y. and Knab, J. R. and Maeder, M.} } @article {295, title = {Terahertz Applications to Biomolecular Sensing}, journal = { International Journal of High Speed Electronics and Systems}, volume = {13}, year = {2003}, chapter = {951-967}, doi = {10.1142/S0129156403002101}, url = {https://www.worldscientific.com/doi/abs/10.1142/S0129156403002101}, author = {Markelz, A. G. and Whitmire, S. E.} } @article {198, title = {Terahertz applications to biomolecular sensing}, journal = {International Journal of High Speed Electronics and Systems}, volume = {13}, number = {04}, year = {2003}, pages = {951-967}, isbn = {0129-1564}, doi = {https://doi.org/10.1142/S0129156403002101}, author = {Markelz, Andrea G and Whitmire, Scott E} } @proceedings {314, title = {Terahertz Biosensors based on Xerogel Substrates}, year = {2003}, address = {Santa Barbara, CA}, author = {Chen, J.-Y. and Cox, W. and Bright, F. V. and Cerne, J. and Markelz, A. G.} } @article {194, title = {THz time domain spectroscopy of biomolecular conformational modes}, journal = {Physics in Medicine \& Biology}, volume = {47}, number = {21}, year = {2002}, pages = {3797}, isbn = {0031-9155}, doi = {https://doi.org/10.1088/0031-9155/47/21/318}, author = {Markelz, Andrea and Whitmire, Scott and Hillebrecht, Jay and Birge, Robert} } @proceedings {316, title = {Terahertz Time domain spectroscopy of the M intermediate state of Bacteriorhodopsin}, year = {2001}, month = {09/2001}, pages = {345-348}, address = {Toulouse, France}, author = {Whitmire, S. and Markelz, A. G. and Hillebrecht, J. R. and Birge, R. R.} } @article {270, title = {Temperature-dependent terahertz output from semi-insulating GaAs photoconductive switches}, journal = {Applied Physics Letters}, volume = {72}, number = {18}, year = {1998}, note = {ISI Document Delivery No.: ZK775
Times Cited: 22
Cited Reference Count: 21
Cited References:
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Flanders BN, 1996, J PHYS CHEM-US, V100, P11824, DOI 10.1021/jp960953c
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Kindt JT, 1996, J PHYS CHEM-US, V100, P10373, DOI 10.1021/jp960141g
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ZHANG XC, 1990, APPL PHYS LETT, V56, P1011, DOI 10.1063/1.102601
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Markelz, AG Heilweil, EJ
Markelz, Andrea/0000-0003-0443-4319
22

6
Amer inst physics
Woodbury}, month = {May}, pages = {2229-2231}, type = {Article}, abstract = {

The temperature dependence of the terahertz (THz) output power and spectra from biased photoconductive switches was measured for several antenna gap widths and applied biases. The spectrally integrated THz output had a nonmonotonic temperature dependence in all cases with the value increasing by a factor of 3 from room temperature to 150 K for low biases and 100 K at high biases. An abrupt decrease in output power occurs below 90 K, and the spectrum shifts to lower frequencies as the temperature is lowered. (C) 1998 American Institute of Physics.

}, keywords = {domain, generation, Physics, pulses, semiconductor surfaces, transmission spectroscopy}, isbn = {0003-6951}, doi = {10.1063/1.121329}, author = {Markelz, A. G. and Heilweil, E. J.} } @article {258, title = {Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive}, journal = {Applied Physics Letters}, volume = {68}, number = {6}, year = {1996}, note = {ISI Document Delivery No.: TT663
Times Cited: 59
Cited Reference Count: 12
Cited References:
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BETHUNE DS, 1989, J OPT SOC AM B, V6, P910, DOI 10.1364/JOSAB.6.000910
CERNE J, 1995, PHYS REV B, V51, P5253, DOI 10.1103/PhysRevB.51.5253
CONWELL E, 1967, SOLID STATE PHYS S, V9
GUPTA R, 1992, PHYS REV B, V46, P7745, DOI 10.1103/PhysRevB.46.7745
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KOMIYAMA S, 1985, PHYS REV B, V32, P5532, DOI 10.1103/PhysRevB.32.5532
MARKELZ AG, 1994, SOLID STATE ELECTRON, V37, P1243, DOI 10.1016/0038-1101(94)90399-9
MARKELZ AG, 1995, THESIS U CALIFORNIA
SHAH J, 1984, APPL PHYS LETT, V44, P322, DOI 10.1063/1.94739
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Asmar, NG Cerne, J Markelz, AG Gwinn, EG Sherwin, MS Campman, KL Gossard, AC
Sherwin, Mark S/Q-4762-2017
Sherwin, Mark S/0000-0002-3869-1893; Markelz, Andrea/0000-0003-0443-4319
59

7
Amer inst physics
Woodbury}, month = {Feb}, pages = {829-831}, type = {Article}, abstract = {

We use photoluminescence to study the time-average energy distribution of electrons in the presence of strong steady-state drive at terahertz (THz) frequencies, in a modulation-doped 125 Angstrom AlGaAs/GaAs square well that is held at low lattice temperature TL. We find that the energy distribution can be characterized by an effective electron temperature, T-e(\>T-L), that agrees well with values estimated from the THz-illuminated, dc conductivity. This agreement indicates that under strong THz drive, LO phonon scattering dominates both energy and momentum relaxation; that the carrier distribution maintains a heated, thermal form; and that phonon drift effects are negligible. (C) 1996 American Institute of Physics.

}, keywords = {hot-electrons, Physics}, isbn = {0003-6951}, doi = {10.1063/1.116547}, author = {Asmar, N. G. and Cerne, J. and Markelz, A. G. and Gwinn, E. G. and Sherwin, M. S. and Campman, K. L. and Gossard, A. C.} } @inbook {304, title = {Third Harmonic Generation in a Gaas/Algaas Superlattice in the Bloch Oscillator Regime}, booktitle = {Hot Carriers in Semiconductors}, volume = {eds. Hess, Karl, Leburton, J.P., Ravaioli, U.}, year = {1996}, pages = {161-163}, publisher = {Plenum Press}, organization = {Plenum Press}, address = {New York, NY}, url = {https://www.springer.com/gp/book/9781461380351}, author = {Wanke, M. C. and Markelz, A. G. and Unterrainer, K. and Allen, S. J. and Bhatt, R.} } @proceedings {181, title = {Terahertz grid frequency doublers}, year = {1995}, publisher = {Citeseer}, url = {https://www.nrao.edu/meetings/isstt/papers/1995/1995199206.pdf}, author = {Chiao, Jung-Chih and Markelz, Andrea and Li, Yongjun and Hacker, Jonathan and Crowe, Thomas and Allen, James and Rutledge, David} } @proceedings {317, title = {Third harmonic generation in a GaAs/AlGaAs Superlattice in the Bloch Oscillator Regime}, year = {1995}, month = {07/1995}, pages = {161-163}, address = {Chicago, IL}, author = {Wanke, M. C. and Markelz, A.G. and Unterrainer, K. and Allen, S. J. and Bhatt, R.} }