[16a-Z31-1~11] 17.2 Graphene

[16a-Z31-10] Development of Graphene-Based Ultra-Thin Optical Devices for Space Missions

〇Yoshimi Niwa¹, Kazuto Kashiwakura¹, Tomoyo Ogawa¹, Yuzuru Tawara¹, Ryo Kitaura¹, Ikuyuki Mitsuishi¹, Kenji Kawahara², Hiroki Ago², Takuro Taniguti³, Kentaro Nomoto³, Hiroki Kodaka³ (1.Nagoya Univ., 2.Kyusyu Univ. GIC., 3.Ushio Inc.)

Keywords:graphene

Thin-film optical devices are used in a variety of fields including space development and many different ways known as passive thermal control systems, optical and contamination blocking filters also in astrophysics. Temperature control, optical and contamination blocking capabilities are essential to keep the performances (e.g., angular resolution) constant in space, improve a signal-to-noise ratio, and reduce sensitivity degradation for optics and detectors on board space vehicles especially in X-ray missions. For such devices, high X-ray transmission and tolerance for severe space environments such as random and acoustic vibrations are both required at the same time. To satisfy the requirements, plastic films such as polyimide with high thermal tolerance and high mechanical intensity have been utilized in previous missions but the improvements have been strongly desired to increase transmission especially in a soft X-ray energy band. Thus, we have proposed to introduce ultra-thin graphene for such devices and have started development to achieve ultra-high transmission from UV to soft X-ray energy bands.