A gold hybrid structure as optical coupler for quantum well infrared photodetector

Ding, Jianfei; Chen, Xiaoshuang; Li, Qian; Jing, Youliang; Li, Zhifeng; Li, Ning; Lü, Wei

doi:10.1063/1.4893752

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…Meanwhile, taking the requirement of practical QWIPs device into account, an appropriate doping to both the GaAs contact layers should be considered 24 37 . The further calculation of the absorptions from different layers of QWIPs with our proposed metallic optical incoupler is performed, substituting n -doped GaAs contact layers with a doping concentration of n = 2.5 × 10 17 cm −3 for the intrinsic GaAs ones.…”

Section: Resultsmentioning

confidence: 99%

“…proposed a design of quasi-1D metallic grating to enhance the optical coupling in AlGaN/GaN QWIPs around the resonance wavelength of 4.65 μm 22 . For longer wavelength, metals resembling perfect electric conductors, highly confined resonant modes, namely SSPs, exist on the metal surface modified by periodic microstructure, which could bring the advantage of plasmonics into the longer-wavelength spectral range that is especially important for the designs of various infrared devices 23 24 25 26 . For example, a design principle for enhancing the infrared absorption of QWIPs has been proposed using the propagating SSPs mode introduced by a 2D gold grating 27 .…”

mentioning

confidence: 99%

“…We chose a typical experimental value of ε ″ = 0.5 in our simulation. As a proof-of-principle, the thickness of QWs is set as 400 nm 24 27 , while the thicknesses of GaAs top and bottom contact layers are fixed to 200 nm and 300 nm, respectively.…”

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confidence: 99%

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Highly efficient metallic optical incouplers for quantum well infrared photodetectors

Liu

Chen

Huang

et al. 2016

Sci Rep

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Herein, we propose a highly efficient metallic optical incoupler for a quantum well infrared photodetector (QWIP) operating in the spectrum range of 14~16 μm, which consists of an array of metal micropatches and a periodically corrugated metallic back plate sandwiching a semiconductor active layer. By exploiting the excitations of microcavity modes and hybrid spoof surface plasmons (SSPs) modes, this optical incoupler can convert infrared radiation efficiently into the quantum wells (QWs) layer of semiconductor region with large electrical field component (Ez) normal to the plane of QWs. Our further numerical simulations for optimization indicate that by tuning microcavity mode to overlap with hybrid SSPs mode in spectrum, a coupled mode is formed, which leads to 33-fold enhanced light absorption for QWs centered at wavelength of 14.5 μm compared with isotropic absorption of QWs without any metallic microstructures, as well as a large value of coupling efficiency (η) of |Ez|2 ~ 6. This coupled mode shows a slight dispersion over ~40° and weak polarization dependence, which is quite beneficial to the high performance infrared photodetectors.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Highly efficient metallic optical incouplers for quantum well infrared photodetectors

Liu

Chen

Huang

et al. 2016

Sci Rep

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“…However, the quantum efficiency of quantum well detectors has always been a difficult problem to overcome. In order to solve this problem, many teams have conducted corresponding research work [1][2][3][4][5][6][7] . Among them, the Arnaud Berurier team has conducted research on 11-14um wide spectral detectors [8] .…”

Section: Introductionmentioning

confidence: 99%

The influence of different angles of grating on the performance of quantum well infrared photodetectors

Wang,

Zhang

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Detector Technologies

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Quantum well infrared photodetectors (QWIPs) have natural advantages, such as high material maturity and good uniformity. But its low quantum efficiency is often criticized as a drawback. The quantum well optical coupling structure is one of the key factors affecting the quantum efficiency of quantum well detectors. This article mainly focuses on the impact of the optical coupling structure of quantum well detectors on detector wavelength, coupling efficiency, and other aspects. We have established an optical coupling structure model for quantum well detectors, mainly consisting of three different angles of structure structures: 45 degrees, 62 degrees, and 90 degrees periodic two-dimensional diffraction gratings. The 3D-FDTD simulation method was used to simulate the optical coupling structure of quantum well detectors, and the performance indicators of the three structures, such as response wavelength and coupling efficiency, were compared. At the same time, simulations were conducted on different angles of periodic two-dimensional diffraction gratings. It can be seen that as the grating angle increases, the response spectrum width widens, but the amplitude of the response decreases.

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Integrated Photonic Structure Enhanced Infrared Photodetectors

Jiang

Shi

Zhou

et al. 2021

Advanced Photonics Research

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The application fields of infrared photodetectors are quite extensive. Compared with traditional infrared photodetection materials such as IV and III–V semiconductors, newly emerging low‐dimensional materials and quantum materials (e.g., 2D materials and quantum wells) have many advantages in different aspects, such as wide spectral range, low dark current, room temperature operation, and high processing compatibility. However, the performance of photodetectors based on low‐dimensional materials is limited by the ultra small thicknesses, polarization selectivity, and the poor absorption efficiency. Therefore, improving the performance of infrared photodetectors based on low‐dimensional materials has been a focus research task in recent years. The integration of photonic structures can improve the performance of infrared photodetectors, such as enhancing absorption efficiency, reducing the volume of active materials, and increasing polarization selectivity. Herein, different kinds of photonic structure integrated infrared photodetectors, roughly divided into two categories, namely, dielectric photonic structure integrated ones and metallic photonic structure integrated ones, are reviewed. The active materials include 2D materials, quantum wells, quantum dots, and carbon nanotubes.

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A gold hybrid structure as optical coupler for quantum well infrared photodetector

Cited by 5 publications

References 37 publications

Highly efficient metallic optical incouplers for quantum well infrared photodetectors

Highly efficient metallic optical incouplers for quantum well infrared photodetectors

The influence of different angles of grating on the performance of quantum well infrared photodetectors

Integrated Photonic Structure Enhanced Infrared Photodetectors

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