Chin. Phys. Lett.  2012, Vol. 29 Issue (4): 044203    DOI: 10.1088/0256-307X/29/4/044203
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
THz Output Improvement in a Photomixer with a Resonant-Cavity-Enhanced Structure
DU Ming-Di,SUN Jun-Qiang**,CHENG Wen-Long
Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
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DU Ming-Di, SUN Jun-Qiang, CHENG Wen-Long 2012 Chin. Phys. Lett. 29 044203
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Abstract We carry out a detailed theoretical study on THz coherent generation in an LTG-GaAs photomixer with a resonant-cavity-enhanced (RCE) structure. In the structure, an improvement in THz output can be achieved by increasing the quantum efficiency. Under optimized structure parameters, the maximum quantum efficiency of the RCE photomixer is 93%, which is 2.82 times higher than that of the case without an RCE structure. The corresponding THz output ratio of the two structures is found to be about eight in the whole range of the lower frequency at the same incident optical power.
Received: 20 November 2011      Published: 04 April 2012
PACS:  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
  42.60.Lh (Efficiency, stability, gain, and other operational parameters)  
  78.20.Bh (Theory, models, and numerical simulation)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/4/044203       OR      https://cpl.iphy.ac.cn/Y2012/V29/I4/044203
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DU Ming-Di
SUN Jun-Qiang
CHENG Wen-Long
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