Generation and detection of ultrabroadband terahertz radiation using photoconductive emitters and receivers
Abstract
We report the coherent generation and detection of ultrabroadband terahertz (THz) radiation using low-temperature-grown GaAs photoconductive antennas as both emitters and receivers. THz radiation with frequency components over 15THz was obtained, the highest reported for a THz time-domain system based on photoconductive antennas. Such a system has a smooth spectral distribution between 0.3 and 7.5THz, ideal for spectroscopic applications. In addition, sharp spectral features at 8.0 and 8.8THz were observed, and explained in terms of optical phonon resonances in the photoconductive antennas.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
At low frequencies, the near constant −π/2 phase is as expected for a single-cycle pulse; the nonlinear increase in phase with frequency can be assigned to chirp processes such as dispersion in the electro-optic crystal and the GaAs emitter.
“At low frequencies, the near constant −π/2 phase is as expected for a single-cycle pulse,20 while the nonlinear increase in phase with frequency can be assigned to processes that introduce chirp, such as dispersion in the electro-optic crystal21 and the GaAs emitter.18”
From Dual-Beam THz Spectrometer with Low-Aberration Optics and Off-Axis Multipixel Photoconductive Emitters for Reduced Systematic Errors (2025) · cites this paper as [18]
Collecting and using THz radiation emitted backward in reflection geometry avoids dispersion and absorption in the GaAs substrate at higher frequencies.
“The THz radiation emitted backward (reflection geometry) was collected and used, to avoid dispersion and absorption in the GaAs substrate at higher frequencies.18”
From Dual-Beam THz Spectrometer with Low-Aberration Optics and Off-Axis Multipixel Photoconductive Emitters for Reduced Systematic Errors (2025) · cites this paper as [18]
Cites
Beard, M. C., Turner, G. M., & Schmuttenmaer, C. A. (2002) · The Journal of Physical Chemistry B · doi:10.1021/jp020579i · Cited by 612 · see citing works
Tani, M., Matsuura, S., Sakai, K., & Nakashima, S.-I. (1997) · Applied Optics · doi:10.1364/ao.36.007853 · Cited by 481 · see citing works
Generation and field-resolved detection of femtosecond electromagnetic pulses tunable up to 41 THz
Huber, R., Brodschelm, A., Tauser, F., & Leitenstorfer, A. (2000) · Applied Physics Letters · doi:10.1063/1.126625 · Cited by 413 · see citing works
Design and performance of a THz emission and detection setup based on a semi-insulating GaAs emitter
Zhao, G., Schouten, R. N., van der Valk, N. C. J., Wenckebach, W. T., & Planken, P. C. M. (2002) · Review of Scientific Instruments · doi:10.1063/1.1459095 · Cited by 234 · see citing works
Ultrabroadband terahertz radiation from low-temperature-grown GaAs photoconductive emitters
Shen, Y., Upadhya, P. C., Linfield, E. H., Beere, H. E., & Davies, A. G. (2003) · Applied Physics Letters · doi:10.1063/1.1619223 · Cited by 202 · see citing works
Self-citationHigh resistivity annealed low-temperature GaAs with 100 fs lifetimes
Gregory, I. S., Baker, C. C., Tribe, W. R., Evans, M. J., Beere, H. E., Linfield, E. H., Davies, A. G., & Missous, M. (2003) · Applied Physics Letters · doi:10.1063/1.1628389 · Cited by 143 · see citing works
Self-citationCoherent, broadband midinfrared terahertz beam sensors
Han, P., & Zhang, X.-C. (1998) · Applied Physics Letters · doi:10.1063/1.122668 · Cited by 117 · see citing works
Ultrabroadband photoconductive detection: Comparison with free-space electro-optic sampling
Kono, S., Tani, M., & Sakai, K. (2001) · Applied Physics Letters · doi:10.1063/1.1394719 · Cited by 114 · see citing works
Far-infrared vibrational modes of polycrystalline saccharides
Upadhya, P. C., Shen, Y., Davies, A. G., & Linfield, E. H. (2004) · Vibrational Spectroscopy · doi:10.1016/j.vibspec.2003.12.010 · Cited by 81 · see citing works
Self-citationLiu, T.-A., Tani, M., Nakajima, M., et al. (2003) · Applied Physics Letters · doi:10.1063/1.1604191 · Cited by 80 · see citing works
Monolithic arrays of absorber-coupled voltage-biased superconducting bolometers
Gildemeister, J. M., Lee, A. T., & Richards, P. L. (2000) · Applied Physics Letters · doi:10.1063/1.1326844 · Cited by 50 · see citing works
Dauchez, M., Lagant, P., Derreumaux, P., et al. (1994) · Spectrochimica Acta Part A Molecular Spectroscopy · doi:10.1016/0584-8539(94)80118-5 · Cited by 37 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy
Ulbricht, R., Hendry, E., Shan, J., Heinz, T. F., & Bonn, M. (2011) · Reviews of Modern Physics · doi:10.1103/revmodphys.83.543 · Cited by 1,293 · see citing works
Tutorial: An introduction to terahertz time domain spectroscopy (THz-TDS)
Neu, J., & Schmuttenmaer, C. A. (2018) · Journal of Applied Physics · doi:10.1063/1.5047659 · Cited by 675 · see citing works
Chopra, N., & Lloyd-Hughes, J. (2025) · ACS Photonics · doi:10.1021/acsphotonics.4c01934 · Cited by 8 · see citing works
- Authors
- Shen, Y. C., Upadhya, P. C., Beere, H. E., Linfield, E. H., Davies, A. G., Gregory, I. S., Baker, C., Tribe, W. R., & Evans, M. J.
- Affiliations
- University of Cambridge (GB)
- University of Leeds (GB)
- TeraView (United Kingdom) (GB)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2004-07-12
- Volume
- 85
- Issue
- 2
- Pages
- 164-166
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2050791953
- Cited by
- 169
- References
- 12
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 4 · 2023: 6 · 2022: 6 · 2021: 9 · 2020: 5 · 2019: 14 · 2018: 7 · 2017: 9 · 2016: 15 · 2015: 9 · 2014: 9 · 2013: 10 · 2012: 4
- FWCI
- 9.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Superconducting and THz Device Technology
- Keywords
- terahertz radiation, photoconductive antenna, low-temperature-grown GaAs, terahertz time-domain spectroscopy, spectral properties
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
