Time-resolved imaging utilizing optical sampling

Research Project

Project/Area Number	24550023
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Physical chemistry
Research Institution	Kyoto Institute of Technology
Principal Investigator	NAGAHARA Tetsuhiko 京都工芸繊維大学, 材料化学系, 助教 (70390664)
Project Period (FY)	2012-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000) Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Keywords	超高速分光 / 反応動力学
Outline of Final Research Achievements	An ultrafast optical imaging method utilizing time-resolved optical sampling has been developed. The apparatus was constructed using a twin mode-locked laser oscillator of variable cavity lengths, which share an excitation laser and an optical breadboard, for relative stability against environmental fluctuations. Their relative phase of the pulse repetition frequencies at higher harmonics was detected and locked after heterodyne down-conversion using a common microwave oscillator. An intensity cross-correlation width of ~70 fs, which was similar to those of auto-correlations, was obtained for a long time by an optical intensity correlator when locked. Optical imaging of complex molecular systems using the apparatus is under investigation.