Detection band expansion by independently tunable double resonances in a long-wavelength dual-color QWIP

Abstract

Multi-resonance light coupling management is a promising way to expand the operating spectral ranges of optoelectronic devices. The classical strategies are either lack of independent tunability for each resonance or involved with complex fabrication. Here, we propose a new scheme for expanding the operating spectral range of an optoelectronic device through a dual-color active material integrated with a simple resonant waveguide structure. The TM waveguide mode and the SPP mode of the resonant waveguide structure are regulated to match the two active regions of the dual-color material both spectrally and spatially. Applying this scheme to a long-wavelength infrared quantum well photodetector, the absorption efficiencies at the two peak detection wavelengths of the dual-color quantum wells are both enhanced by more than 10 times compared with the case of a standard 45° edge facet coupled device with the same detection material. The simple light coupling structure is easy to accomplish and compatible with focal plane arrays. For thermal radiation detection, the absorption efficiency of the 300 K blackbody radiation by our dual-color detector is 83.8% higher than that by a single-color detector with the optimized structural parameters. Moreover, either polarization sensitive or polarization insensitive detection could be achieved in this dual-color infrared quantum well photodetector by using anisotropic or isotropic gratings.

High-Discrimination Circular Polarization Detection Based on Dielectric-Metal-Hybrid Chiral Metamirror Integrated Quantum Well Infrared Photodetectors

“…The dielectric-metal-hybrid chiral metamirror is periodic in the x - y plane. The multiple III-V semiconductor layers are grown by epitaxy and integrated with the dielectric-metal-hybrid chiral metamirror in a flip-chip manner, which is generally used by focal plane arrays [ 40 , 44 , 47 , 48 , 49 ]. The bottom contact layer made of heavily doped GaAs has a thickness ( h 1 ) of 560 nm.…”

High coupling efficiency two-color quantum well infrared photodetectors based on dual micro-cavities

“…Surface plasmon structures have emerged as a highly promising choice in this regard, renowned for their subwavelength confinement of light and localized field enhancement [12,13]. Researchers have found extensive applications in quantum well infrared detectors as well [14][15][16][17]. Furthermore, to enhance the detection and identification capabilities of targets in complex background environments, the development of two-color or multi-color detector technologies has become a pivotal research direction in current infrared detection technology [18,19].…”

“…Dai et al proposed an integration scheme of two-color active region materials with a harmonic waveguide, utilizing independently tunable guided mode resonances and surface plasmon polariton resonances to achieve two-color detection in the midwave infrared. Compared to standard devices, both active regions exhibited an absorption improvement of more than tenfold [17]. Li et al proposed a mid-long-infrared two-color photodetector combining quantum cascade detectors and surface plasmonic coupling structure, in which mid-infrared and long-infrared pixels are arranged in an interleaved manner, resulting in 7.1 and 7 times enhancement in mid-infrared and long-infrared pixel absorption [20].…”

Nano scattering particle: an approach to improve quality of the commercial led

“…Since the first introduction in 1962, light-emitting diodes (LEDs) have emerged as a sustainable lighting solution in the lighting industry [1][2][3]. LEDs demonstrate several illumination benefits, including low-energy consumption, long-term operation, better light performance, and environmental-friendly technology [4][5][6]. The LED model can be fabricated with various approaches, but one of the most common techniques is the use of phosphor to convert blue/ultraviolet radiation from the LED chip.…”