Investigation of GaAlAs photocathode with nanostructures sensitive to narrow band 532 nm wavelength

Shiman Li; Yijun Zhang; Feng Shi; Gangcheng Jiao; Xin Guo; Ziheng Wang; Kaimin Zhang

doi:10.1117/12.2657474

8 December 2022 Investigation of GaAlAs photocathode with nanostructures sensitive to narrow band 532 nm wavelength

Shiman Li, Yijun Zhang, Feng Shi, Gangcheng Jiao, Xin Guo, Ziheng Wang, Kaimin Zhang

Proceedings Volume 12479, Optical Manipulation and Structured Materials Conference (OMC 2022); 1247902 (2022) https://doi.org/10.1117/12.2657474
Event: Optics and Photonics International Congress, 2022, Yokohama, Japan

Abstract

The underwater photoelectric detection equipment mainly uses 532 nm laser as the light source, and GaAlAs with Al component of 0.63 can obtain the cutoff wavelength near 532 nm, which is an excellent photocathode material to meet the requirement of narrow band spectral response of 532 nm laser. Furthermore, the light absorptance of the cathode can be improved effectively by the quadrangular prism or cylinder nanostructured arrays prepared on the reflection-mode Ga_0.37Al_0.63As cathode surface, and the maximum light absorptance can reach 96.2% at 532 nm, when the cylinder nanostructured array with a height of 900 nm and a base width of 100 nm. Nevertheless, the Ga_0.37Al_0.63As cathode with the quadrangular prism nanostructured array is less influenced by the incident angle of light.

Citation Download Citation

Shiman Li, Yijun Zhang, Feng Shi, Gangcheng Jiao, Xin Guo, Ziheng Wang, and Kaimin Zhang "Investigation of GaAlAs photocathode with nanostructures sensitive to narrow band 532 nm wavelength", Proc. SPIE 12479, Optical Manipulation and Structured Materials Conference (OMC 2022), 1247902 (8 December 2022); https://doi.org/10.1117/12.2657474

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