High quantum efficiency N-structure type-II superlattice mid-wavelength infrared detector with resonant cavity enhanced design

Design and calculation of photoelectric properties of resonance enhanced InAs/GaSb type-II superlattices photodetectors with diffraction rings structure

“…In order to optimize the overall photoelectric performance of the device, the research of adding resonator structures to conventional detectors has attracted the attention of researchers. Current researches include adding SPP [ 10 , 11 ] or metamaterials [ 12 ] on the device surface, adding Bragg reflectors [ 13 , 14 ] or layer of heavily-doped virtual substrate [ 15 , 16 ] on the substrate, and adding dielectric resonant antennas on the device side [ 17 ], etc. In 2015, Jill A. Nodde et al fabricated a resonant cavity enhanced (RCE) photodetector by adding one-dimensional plasma gratings on the surface of T2SLs detectors, which can couple incident light into the plane of the device and propagate along the semiconductor metal interface in plasmon mode [ 10 ].…”

“…In 2017, John A. Montoya et al proposed and demonstrated a T2SLs detector architecture with deep subwavelength metamaterials, which significantly improved the detection QE and absorption of incident light, demonstrating the ability of multifunctional metamaterials to achieve efficient wavelength-selective detection in infrared spectroscopy [ 12 ]. In 2017, Wu et al proposed a RCE T2SLs infrared detector with DBR and N -structure [ 13 ]. Subsequently, in 2019, Veronica Letka et al fabricated a nBn structure T2SLs RCE infrared detectors with DBR, extending the cutoff wavelength to the MWIR range and demonstrating its superior optoelectronic performance [ 14 ].…”