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  Continuous wave terahertz radiation from antennas fabricated on C-12-irradiated semi-insulating GaAs

Deshmukh, P., Mendez-Aller, M., Singh, A., Pal, S., Prabhu, S. S., Nanal, V., et al. (2015). Continuous wave terahertz radiation from antennas fabricated on C-12-irradiated semi-insulating GaAs. OPTICS LETTERS, 40(19), 4540-4543. doi:10.1364/OL.40.004540.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-6366-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-6367-3
Genre: Journal Article

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 Creators:
Deshmukh, Prathmesh1, Author
Mendez-Aller, M.1, Author
Singh, Abhishek1, Author
Pal, Sanjoy1, Author
Prabhu, S. S.1, Author
Nanal, Vandana1, Author
Pillay, R. G.1, Author
Doehler, G. H.2, Author              
Preu, S.3, 4, Author              
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              
3Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364711              
4International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364697              

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Free keywords: LOW-TEMPERATURE GAAS; PHOTOCONDUCTIVE ANTENNAS; TECHNOLOGY; LIFETIMES; EMISSIONOptics;
 Abstract: We demonstrate continuous wave (CW) terahertz generation from antennas fabricated on C-12-irradiated semi-insulating (SI) GaAs substrates. The dark current drawn by the antennas fabricated on irradiated substrates is similar to 3 to 4 orders of magnitude lower compared to antennas fabricated on un-irradiated substrates, while the photocurrents decrease by only similar to 1.5 orders of magnitude. This can be attributed to the strong reduction of the carrier lifetime that is 2.5 orders of magnitude, with values around tau(rec) = 0.2 ps. Reduced thermal heating allows for higher bias voltages to the irradiated antenna devices resulting in higher CW terahertz power, just slightly lower than that of low-temperature grown GaAs (LT GaAs) at similar excitation conditions. (C) 2015 Optical Society of America

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Language(s): eng - English
 Dates: 2015
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000364468000041
DOI: 10.1364/OL.40.004540
 Degree: -

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Title: OPTICS LETTERS
Source Genre: Journal
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Publ. Info: 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA : OPTICAL SOC AMER
Pages: - Volume / Issue: 40 (19) Sequence Number: - Start / End Page: 4540 - 4543 Identifier: ISSN: 0146-9592