Resonant cavity-enhanced quantum-dot infrared photodetectors with sub-wavelength grating mirror

Chi Cheng Wang; Sheng-Di Lin

doi:10.1063/1.4809574

Resonant cavity-enhanced quantum-dot infrared photodetectors with sub-wavelength grating mirror

Chi Cheng Wang, Sheng-Di Lin

Department of Electronics Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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	https://doi.org/10.1063/1.4809574
State	Published - 7 Jun 2013

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title = "Resonant cavity-enhanced quantum-dot infrared photodetectors with sub-wavelength grating mirror",

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.",

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AB - 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.

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