Development of nonlinear microspectroscopic appratus with spatial light modulation for molecular-selective imaging of nano-structured media

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13938
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Tokyo University of Science
• Principal Investigator: Banno Motohiro 東京理科大学, 理学部第一部化学科, 講師 (40432570)
• Co-Investigator(Renkei-kenkyūsha): YUI Hiroharu 東京理科大学, 理学部第一部化学科, 教授 (20313017) ; TANIGUCHI Jun 東京理科大学, 基礎工学部電子応用工学科, 教授 (40318225)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 超解像顕微分光 / ラマン分光 / 顕微振動分光 / 空間光位相変調 / 波面整形

Outline of Final Research Achievements

A microscopic spectrometer based on nonlinear optics with an ultra high spatial resolution by spatial light modulation has been developed. In the developed apparatus, one of two laser beams, applied for the generation of a nonlinear optical signal, was modulated, and the focal spot of the beam was shaped co-circular. Due to the spot shaping, the area generating the nonlinear optical signal was limited. By this development, the spatial resolution was successfully improved by 15% without changing the wavelengths of the input laser lights and the optical elements used in the apparatus. In addition, in the study, a wavefront optimization mechanism was also added to the developed apparatus with a custom-made algorithm based on the adaptive optics. By this development, a basis of a microscopic spectrometer for highly space-resolved measurements of deeply buried samples has been successfully established.

Free Research Field

物理化学