Development of Immersion Grating for Mid-infrared High-resolution Spectroscopy: Technique to Coat Metal on Diffraction Surface

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740131
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: SARUGAKU Yuki 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 研究員 (10512147)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: イマージョングレーティング / 高分散分光 / 赤外線 / CdZnTe

Research Abstract

We have advanced the development of an immersion grating, which could be the key device to realize a compact lightweight high-resolution spectrograph in the mid-infrared wavelength region. From precise measurements of transmittances of some candidate materials, it was found that low-carrier (high-resistivity) CdZnTe has high transparency (internal attenuation is less than 0.01/cm) at the wavelength range from 5 to 20 um. From experiments to coat flat substrate of CdZnTe with metal, it was found that Al has sufficient reflectivity as reflective coating on the diffraction surface and that the coating is durable at low temperature. Also, a practical large CdZnTe immersion grating (without coating) was fabricated, which is the first case in the world.

Research Products

• [Journal Article] Development of CdZnTe immersion grating for spaceborne application (2012)
  • Author(s): Yuki Sarugaku, Yuji Ikeda, Naoto Kobayashi, Takashi Sukegwa, Shigeru Sugiyama, Keigo Enya, Hirokazu Kataza, Hideo Matsuhara, Takao Nakagawa, Hideyo Kawakita, Sohei Kondo, Yasuhiro Hirahara, Chikako Yasui
  • Journal Title: Proc. SPIE Volume: 8442 Pages: 844257
  • DOI: 10.1117/12.926742
• [Presentation] The precise measurement of the attenuation coefficients of various IR optical materials applicable to immersion grating (2014)
  • Author(s): Sayumi Kaji, Yuki Sarugaku, Yuji Ikeda, Kenshi Nakanishi, Naoto Kobayashi, Sohei Kondo, Chikako Yasui
  • Organizer: SPIE 2014 Astronoimcal Telescopes + Instrumentation
  • Place of Presentation: Canada
  • Year and Date: 20140622-27
• [Presentation] 近中間赤外線用大型CdZnTe製イマージョングレーティングの光学評価 (2013)
  • Author(s): 池田優二、猿楽祐樹、加地紗由美、小林尚人、助川隆、杉山成、近藤荘平、河北秀世、安井千香子
  • Organizer: 日本天文学会2013年秋季年会
  • Place of Presentation: 宮城
  • Year and Date: 20130910-12
• [Presentation] 近中間赤外線イマージョングレーティング用光学材料の吸収係数精密測定 (2013)
  • Author(s): 加地紗由美、猿楽祐樹、池田優二、中西賢之、近藤荘平、河北秀世、安井千香子、小林尚人
  • Organizer: 日本天文学会2013年秋季年会
  • Place of Presentation: 宮城
  • Year and Date: 20130910-12
• [Presentation] 近中間赤外線用イマージョン回折格子の開発VII–CdZnTeグレーティングの製作と金属反射膜 (2012)
  • Author(s): 猿楽祐樹、池田優二、小林尚人、助川隆、杉山成、P.J. Kuzumenko、塩谷圭吾、片ざ宏一、松原英雄、中川貴雄、河北秀世、近藤荘平、平原靖大、安井千香子
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分
  • Year and Date: 20120919-21
• [Presentation] Development of CdZnTe immersion grating for spaceborne application (2012)
  • Author(s): Yuki Sarugaku, Yuji Ikeda, Naoto Kobayashi, Takashi Sukegwa, Shigeru Sugiyama, Keigo Enya, Hirokazu Kataza, Hideo Matsuhara, Takao Nakagawa, Hideyo Kawakita, Sohei Kondo, Yasuhiro Hirahara, Chikako Yasui
  • Organizer: SPIE 2012 Astronoimcal Telescopes + Instrumentation
  • Place of Presentation: The Netherlands
  • Year and Date: 20120701-06