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High power terahertz generation using 1550 nm plasmonic photomixers

Berry, Christopher W. and Hashemi, Mohammad R. and Preu, Sascha and Lu, Hong and Gossard, Arthur C. and Jarrahi, Mona :
High power terahertz generation using 1550 nm plasmonic photomixers.
[Online-Edition: http://dx.doi.org/10.1063/1.4890102]
In: Applied Physics Letters, 105 011121.
[Article] , (2014)

Official URL: http://dx.doi.org/10.1063/1.4890102

Abstract

We present a 1550 nm plasmonic photomixer operating under pumping duty cycles below 10, which offers significantly higher terahertz radiation power levels compared to previously demonstrated photomixers. The record-high terahertz radiation powers are enabled by enhancing the device quantum efficiency through use of plasmonic contact electrodes, and by mitigating thermal breakdown at high optical pump power levels through use of a low duty cycle optical pump. The repetition rate of the optical pump can be specifically selected at a given pump duty cycle to control the spectral linewidth of the generated terahertz radiation. At an average optical pump power of 150 mW with a pump modulation frequency of 1 MHz and pump duty cycle of 2, we demonstrate up to 0.8 mW radiation power at 1 THz, within each continuous wave radiation cycle.

Item Type: Article
Erschienen: 2014
Creators: Berry, Christopher W. and Hashemi, Mohammad R. and Preu, Sascha and Lu, Hong and Gossard, Arthur C. and Jarrahi, Mona
Title: High power terahertz generation using 1550 nm plasmonic photomixers
Language: English
Abstract:

We present a 1550 nm plasmonic photomixer operating under pumping duty cycles below 10, which offers significantly higher terahertz radiation power levels compared to previously demonstrated photomixers. The record-high terahertz radiation powers are enabled by enhancing the device quantum efficiency through use of plasmonic contact electrodes, and by mitigating thermal breakdown at high optical pump power levels through use of a low duty cycle optical pump. The repetition rate of the optical pump can be specifically selected at a given pump duty cycle to control the spectral linewidth of the generated terahertz radiation. At an average optical pump power of 150 mW with a pump modulation frequency of 1 MHz and pump duty cycle of 2, we demonstrate up to 0.8 mW radiation power at 1 THz, within each continuous wave radiation cycle.

Journal or Publication Title: Applied Physics Letters
Volume: 105
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics > Terahertz Systems Technology
18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics
Date Deposited: 19 Jun 2015 11:49
Official URL: http://dx.doi.org/10.1063/1.4890102
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