【Domestic Papers】Researchers from the Shandong University Enhancement of solar blind full band absorption in photodetector with Ga₂O₃ nanopore and Al nanograting

      Researchers from the Shandong University have published a dissertation titled "Enhancement of solar blind full band absorption in photodetector with Ga₂O₃ nanopore and Al nanograting " in Optics Express.

Abstract

      In this paper, we presented a novel double-layer light-trapping structure consisting of nanopores and nanograting positioned on both the surface and bottom of a gallium oxide-based solar-blind photodetector. Utilizing the finite element method (FEM), we thoroughly investigated the light absorption enhancement capabilities of this innovative design. The simulation results show that the double-layer nanostructure effectively combines the light absorption advantages of nanopores and nanogratings. Compared with thin film devices and devices with only nanopore or nanograting structures, double-layer nanostructured devices have a higher light absorption, achieving high light absorption in the solar blind area.

Fig. 1. Schematic diagram of double-layer structure based on Ga₂O₃ nanopores and Al nano-gratings.

Fig. 2. Tunability of the optical absorption. The absorption, reflectance, and transmittance as function of P, Hs and r. In the simulations, P = 160 nm, r = 50 nm, Hs = 100 nm, unless otherwise specified.

Original link:https://doi.org/10.1364/OE.523117