Extended UV detection bandwidth: h-BN/Al powder nanocomposites photodetectors sensitive in a middle UV region due to localized surface plasmon resonance effect

Abstract

The development of high-effective photodetectors operating in a wide spectral range is an important technological task. In this work we have demonstrated that the detection bandwidth of h-BN photodetectors in the UV range can be extended due to the surface plasmon resonance (SPR) effect. Theoretical calculations showed that, among Al, Au, Ag, and Cu, Al is the most suitable metal for the h-BN UV sensible detectors due to the SPR effect in the middle UV range. Based on the theoretical predictions, a simple and highly efficient method for obtaining h-BN/Al nanocomposites for localized SPR-based UV detectors was developed. It was demonstrated that the h-BN/Al material is sensitive to UV radiation with a wavelength of 266 nm that is far away of the detection limit of 240 nm inherent for pure h-BN.

DFT calculation for graphene/hexagonal-boron-nitride nanoisland applicate in photonic device

“…Table 2 listed the maximum wavelength of absorption and oscillation strength that been computed by TD-DFT tool. For pure h-BN nanostructure the maximum wave length of absorption is 213.84 nm and oscillation strength is 0.474, result shows that pure h-BN absorbers energy in ultraviolet region of electromagnetic radiation and it is an agreements with the previous research in [28]. In the case that add carbon atoms to the h-BN, the heterostructure forms as we listed in section 3.…”

Localized surface plasmon resonance-enhanced solar-blind Al0.4Ga0.6N MSM photodetectors exhibiting high-temperature robustness

“…When the oscillation frequency matches with the frequency of the external optical field, surface plasmon resonance (SPR) occurs. In metal NPs, the resonant excitation of the SPs is localized around the NP and consequently termed as LSPR [17][18][19][20]. LSPR has been utilized to improve the performance of semiconductor UV PDs.…”