Abstract
We propose and simulate a device structure of resonant cavity-enhanced quantum-dot infrared photodetector (RCE-QDIP). The RCE-QDIP consists of a conventional n-i-n QDIP sandwiched by a bottom GaAs/Al2O3 distributed Bragg reflector and a top mirror of Ge/SiO2 sub-wavelength grating. Aiming for detecting mid-infrared at 8 μm, the total thickness of the device is only ∼7.7 μm. According to our simulation, the external quantum efficiencies of RCE-QDIP could be as high as 59%-78% with the enhancement factors of 7-30, compared with a conventional QDIP. The proposed RCE-QDIP is highly feasible as the various fabrication parameters are considered.
| Original language | English |
|---|---|
| Article number | 213108 |
| Journal | Journal of Applied Physics |
| Volume | 113 |
| Issue number | 21 |
| DOIs | |
| State | Published - 7 Jun 2013 |
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Wang, C. C., & Lin, S-D. (2013). Resonant cavity-enhanced quantum-dot infrared photodetectors with sub-wavelength grating mirror. Journal of Applied Physics, 113(21), [213108]. https://doi.org/10.1063/1.4809574