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