The enhanced infrared absorption of quantum well infrared photodetector based on a hybrid structure of periodic gold stripes overlaid with a gold film

Ding, Jianfei; Chen, Xiaoshuang; Li, Qian; Zhen, Honglou; Jing, Youliang; Wang, Han; Lü, Wei

doi:10.1016/j.optcom.2014.04.057

Cited by 8 publications

(6 citation statements)

References 35 publications

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“…This explains the observed difference in coupling efficiency between RCP and LCP light, which is due to the selective excitation of SPP waves and waveguide resonance by circularly polarized light with different spin directions. To evaluate the performance of the QWIP device, the paper calculated the enhancement factor F of the active region of the quantum well and the device's responsivity R. 50,51 Figure 9 shows the enhancement factor F for LCP and RCP light at the incident wavelength of 14.2 µm. The z value of the active region of the quantum well in this device is 0-0.276 µm.…”

Section: Resultsmentioning

confidence: 99%

A quantum well infrared photodetector capable of distinguishing circularly polarized light operating at very long infrared wavelengths

Jiang,

Feng,

Zhao

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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Traditional circular polarization detectors use natural chiral materials to distinguish circularly polarized light, but they have relatively low circular polarization extinction ratio (CPER) and light responsivity. This can be effectively improved by integrating chiral materials with detection materials. Common quantum well infrared photodetectors (QWIP) lack the ability to distinguish circularly polarized light. This paper proposes a QWIP that operates in the very long infrared wavelengths, which combines etched GaAs two-dimensional chiral metamaterials with quantum well materials, and achieves a high CPER of 42. Based on the combined effect of surface plasmon polariton (SPP) wave and waveguide resonance, the inter-subband absorption can reach 0.5 when the device is vertically illuminated with 14.2 µm right-handed circularly polarized (RCP) light, which is 15 times higher than that of the standard 45°inclined plane coupling device. At this point, the device has a high coupling efficiency of 810% . When left-handed circularly polarized (LCP) light is incident, the device cannot effectively excite the waveguide resonance effect due to destructive interference. The inter-subband absorption and the responsivity under LCP light are both lower than that of the standard device. This device can enhance RCP light and weaken LCP light, while maintaining high performance of the detector and having the ability to distinguish circularly polarized light. Compared to two-dimensional chiral metamaterials made of metal, our device using etched GaAs is simpler in the manufacturing process, cost-effective, and has a higher CPER. This device can be used for detecting greenhouse gases and thermal imaging in the 14-16 µm infrared wavelength range.

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Section: Resultsmentioning

confidence: 99%

A quantum well infrared photodetector capable of distinguishing circularly polarized light operating at very long infrared wavelengths

Jiang,

Feng,

Zhao

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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“…The incident wave is adopted as a plane wave along the negative direction of the z-axis, and the electric field component is along the z-axis direction with an intensity of 1 V/m. The two GaAs layers and the middle QWs layer correspond to a homogeneous dielectric layer with a refractive index of 3.3 [24]. We divide the mesh into 0.05 µm into the x and y directions and 0.06 µm in the z direction.…”

Section: Resultsmentioning

confidence: 99%

Stacked Dual-Band Quantum Well Infrared Photodetector Based on Double-Layer Gold Disk Enhanced Local Light Field

Liu

Zuo

et al. 2021

Nanomaterials

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We propose a stacked dual-band quantum well infrared photodetector (QWIP) integrated with a double-layer gold disk. Two 10-period quantum wells (QW) operating at different wavelengths are stacked together, and gold nano-disks are integrated on their respective surfaces. Numerical calculations by finite difference time domain (FDTD) showed that the best enhancement can be achieved at 13.2 and 11.0 µm. By integrating two metal disks, two plasmon microcavity structures can be formed with the substrate to excite localized surface plasmons (LSP) so that the vertically incident infrared light can be converted into electric field components perpendicular to the growth direction of the quantum well (EZ). The EZ electric field component can be enhanced up to 20 times compared to the incident light, and it is four times that of the traditional two-dimensional hole array (2DHA) grating. We calculated the enhancement factor and coupling efficiency of the device in the active region of the quantum well. The enhancement factor of the active region of the quantum well on the top layer remains above 25 at the wavelength of 13.2 μm, and the enhancement factor can reach a maximum of 45. Under this condition, the coupling efficiency of the device reaches 2800%. At the wavelength of 11.0 μm, the enhancement factor of the active region of the quantum well at the bottom is maintained above 6, and the maximum can reach about 16, and the coupling efficiency of the device reaches 800%. We also optimized the structural parameters and explored the influence of structural changes on the coupling efficiency. When the radius (r1, r2) of the two metal disks increases, the maximum coupling efficiency will be red-shifted as the wavelength increases. The double-layer gold disk structure we designed greatly enhances the infrared coupling of the two quantum well layers working at different wavelengths in the dual-band quantum well infrared photodetector. The structure we designed can be used in stacked dual-band quantum well infrared photodetectors, and the active regions of quantum wells working at two wavelengths can enhance the photoelectric coupling, and the enhancement effect is significant. Compared with the traditional optical coupling structure, the structure we proposed is simpler in process and has a more significant enhancement effect, which can meet the requirements of working in complex environments such as firefighting, night vision, and medical treatment.

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“…1F, using the 3D tubular QWIP operating under a bias of 0.65 V at 60 K (see Materials and Methods). QWIPs with a grating structure have been widely used for infrared focal plane array (FPA) (18)(19)(20)(21)(22)(23)(24), in which the incident light is vertically shone on the structured surface to achieve the maximum coupling efficiency. However, as the incident angle tilts, the infrared current response degrades and the effective visual range becomes narrow (23).…”

Section: Resultsmentioning

confidence: 99%

“…QWIPs with a grating structure have been widely used for infrared focal plane array (FPA) (18)(19)(20)(21)(22)(23)(24), in which the incident light is vertically shone on the structured surface to achieve the maximum coupling efficiency. However, as the incident angle tilts, the infrared current response degrades and the effective visual range becomes narrow (23). Then, by rotating a blackbody source around the 3D tubular QWIP, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, only the incident light with an electric field parallel to the QW stacking direction can be absorbed by QWIPs, according to the socalled polarization selection rule (15,17). Therefore, various optical grating and arrayed coupling designs have been developed to enhance the light absorption efficiency of QWIP devices (18)(19)(20)(21)(22)(23)(24).…”

Section: Introductionmentioning

confidence: 99%

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Self-rolling and light-trapping in flexible quantum well–embedded nanomembranes for wide-angle infrared photodetectors

Wang

Zhen

et al. 2016

Sci. Adv.

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The enhanced infrared absorption of quantum well infrared photodetector based on a hybrid structure of periodic gold stripes overlaid with a gold film

Cited by 8 publications

References 35 publications

A quantum well infrared photodetector capable of distinguishing circularly polarized light operating at very long infrared wavelengths

A quantum well infrared photodetector capable of distinguishing circularly polarized light operating at very long infrared wavelengths

Stacked Dual-Band Quantum Well Infrared Photodetector Based on Double-Layer Gold Disk Enhanced Local Light Field

Self-rolling and light-trapping in flexible quantum well–embedded nanomembranes for wide-angle infrared photodetectors

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