Resonant-cavity-enhanced infrared detector incorporating an ultra-thin type-II superlattice: design and simulation

Qingsong Feng; Bingfeng Liu; Bingfeng Liu; Yang Chen; Ruixin Gong; Ruixin Gong; Lianqing Zhu; Yuan Liu; Mingli Dong

doi:10.1364/AO.491566

Applied Optics
Vol. 62,
Issue 18,
pp. 4786-4792
(2023)
•https://doi.org/10.1364/AO.491566

Resonant-cavity-enhanced infrared detector incorporating an ultra-thin type-II superlattice: design and simulation

Qingsong Feng, Bingfeng Liu, Yang Chen, Ruixin Gong, Lianqing Zhu, Yuan Liu, and Mingli Dong

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Qingsong Feng, Bingfeng Liu, Yang Chen, Ruixin Gong, Lianqing Zhu, Yuan Liu, and Mingli Dong, "Resonant-cavity-enhanced infrared detector incorporating an ultra-thin type-II superlattice: design and simulation," Appl. Opt. 62, 4786-4792 (2023)

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- Surface Optics and Plasmonics
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About this Article
History
- Original Manuscript: March 28, 2023
- Revised Manuscript: May 8, 2023
- Manuscript Accepted: May 17, 2023
- Published: June 12, 2023

Abstract

A resonant-cavity-enhanced type-II superlattice (T2SL) infrared detector based on a metal grating has been designed to address the weak photon capture and low quantum efficiency (QE) issues of T2SL infrared detectors. Simulations have been conducted to analyze the effects of metal grating parameters, including length, thickness, and incident angle, on the spectral response and absorptivity of the absorption layers in T2SL infrared detectors. By optimizing the design, an appropriate resonant cavity structure was obtained. Research results indicate that the resonant cavity structure can significantly enhance the absorption rate of a T2SL infrared detector with a 0.2 µm thick absorption layer in the 3–5 µm wavelength range, observing peak absorption rates at 3.82 µm and 4.73 µm, with values of 97.6% and 98.2%, respectively. The absorption rate of the 0.2 µm thick T2SL absorption layer at peak wavelengths increased from 6.03% and 2.3% to 54.48% and 27.91%, respectively. The implementation of the resonant-cavity-enhanced T2SL infrared detector improves the QE while reducing absorption layer thickness, thus opening up new avenues for improving T2SL detector performance.

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Supplementary Material (2)

Name	Description
Code 1	Simulation Model Based on Comsol Software
Dataset 1	Raw data and graphs obtained from simulation

Data availability

Data underlying the results presented in this paper are available in Dataset 1, Ref. [30] and Code 1, Ref. [31].

30. Q.-S. Feng, “Design and simulation of resonant cavity-enhanced infrared detector incorporating an ultra-thin type-II superlattice,” figshare (2023), https://doi.org/10.6084/m9.figshare.22778351.

31. Q.-S. Feng, “Design and simulation of resonant cavity-enhanced infrared detector incorporating an ultra-thin type-II superlattice,” figshare (2023), https://doi.org/10.6084/m9.figshare.22778381.

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	Metamaterial Absorption
Samples	$A_{t o t a l}$	$A_{t o p - m e t a l}$	$A_{a c t i v e}$	$A_{b o t t o m - m e t a l}$	Wavelength [µm]
Enhanced SL	97.68	31.06	54.48	12.14	3.82
Conventional 0.2 µm SL	6.03	-	6.03	-	3.82
Conventional 2 µm SL	52.66	-	52.66	-	3.82
$L 2 = 150 n m$ $h = 100 n m$	95.12	21.04	59.63	14.45	3.82
$L 2 = 150 n m$ $h = 20 n m$	98.98	44.35	45.12	9.51	3.82
$h = 45 n m$ $L 2 = 500 n m$	70.11	27.19	33.82	9.1	3.82
$h = 45 n m$ $L 2 = 800 n m$	78.56	22.24	42.71	13.61	3.82
Enhanced SL	98.23	60.13	27.91	10.19	4.73
Conventional 0.2 µm SL	2.3	-	2.3	-	4.73
Conventional 2 µm SL	24.85	-	24.85	-	4.73
$L 2 = 150 n m$ $h = 100 n m$	71.98	27.49	27.45	17.04	4.73
$L 2 = 150 n m$ $h = 20 n m$	52.34	33.83	11.6	6.91	4.73
$h = 45 n m$ $L 2 = 500 n m$	42.26	31.86	8.19	2.21	4.73
$h = 45 n m$ $L 2 = 800 n m$	27.78	15.41	6.54	5.83	4.73

Abstract

Supplementary Material (2)

Data availability

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Figures (6)

Tables (1)

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