Ultrasensitive chirality detection: Heterodyne-detected chiral electronic sum frequency generation

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K22159
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Okuno Masanari 東京大学, 大学院総合文化研究科, 准教授 (00719065)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: 非線形分光 / キラリティー

Outline of Final Research Achievements

The aim of this study was to develop electronic sum frequency generation spectroscopy using ultrabroadbad light source. Firstly, we performed the generation of supercontinuum light by using a picosecond laser. By introducing picosecond light whose intensity and polarization were properly controlled, we successfully obtained supercontinuum ranging from the visible to near infrared region. Prior to application to chiral sum frequency generation, we employed this supercontinuum light to generate sum frequency signals from a quartz crystal. The obtained signals were large enough to investigate the spectral- and time-profile of the supercontinuum.

Free Research Field

分子分光

Academic Significance and Societal Importance of the Research Achievements

高出力のピコ秒レーザーとラージモードエリアフォトニック結晶ファイバーを用いた超広帯域光発生に成功し、CARS等の非線形分光への応用に成功した。一方、本研究ではヘテロダイン検出キラルESFG信号を得ることはできなかった。可視域での超広帯域光発生を高効率で行うことができれば、本研究での目的としたヘテロダイン検出キラルESFG信号を実現することができると考えられる。