[18p-PA4-1~20] 3.8 Optical measurement, instrumentation, and sensor

△ [18p-PA4-16] Electrical characteristics of CaF₂-metal interface under vaccum ultraviolet irradiation

〇Kentaro Suzuki¹, Jun Otani¹, Shigo Ono¹, Masahiko Kase² (1.NITech, 2.USHIO INC.)

Keywords:fluoride, VUV detector

In this presentation we report the development of a vacuum ultraviolet detector capable of operating at zero bias by contacting the CaF₂ single crystal and the metal. For the fabrication of the device, we deposited a thin film of Au and Al on both surfaces of a CaF₂ single crystal by vacuum evaporation method. Also, the Au electrode was deposited very thin to make it function as a transparent electrode. As a result, we succeeded in acquisition of wavelength sensitivity characteristics and measurement of pulsed light source at zero bias.