JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION 25(9) 2244-2250 2008年9月 [査読有り]
This paper describes generalized grating imaging with equations based on geometrical optics and wave optics. It shows that the equation derived by wave optics agrees well with the description by geometrical optics. The derived equation based on wa...
Koichi Iwata Hajime Okajima Satyen Saha Hiro-O Hamaguchi
ACCOUNTS OF CHEMICAL RESEARCH 40(11) 1174-1181 2007年11月 [査読有り]
We show several pieces of Raman spectroscopic evidence that are indicative of local structure formation in imidazolium-based ionic liquids. Low-frequency Raman spectra of C(n)mimX, where C(n)mim stands for 1-alkyl(CnH2n+1)-3-methylimidazolium cati...
JOURNAL OF CHEMICAL PHYSICS 126(20) 204501 2007年5月 [査読有り]
Vibrational energy relaxation of degenerate CO stretches of four tungsten carbonyl complexes, W(CO)(6), W(CO)(5)(CS), W(CO)(5)(CH3CN), and W(CO)(5)(CD3CN), is observed in nine alkane solutions by subpicosecond time-resolved infrared (IR) pump-prob...
Koichi Iwata Kyousuke Yoshida Yuta Takada Hiro-o Hamaguchi
CHEMISTRY LETTERS 36(4) 504-505 2007年4月 [査読有り]
Vibrational cooling rates in room temperature ionic liquids were measured with picosecond time-resolved Raman spectroscopy. The 1570-cm(-1) Raman band of the first excited singlet (S-1) state of trans-stilbene was used as a "Raman thermometer." Th...
Wenjuan Xiong Lili Du Kin Cheung Lo Haiting Shi Tomohisa Takaya Koichi Iwata Wai Kin Chan David Lee Phillips
JOURNAL OF PHYSICAL CHEMISTRY LETTERS 9(14) 3819-3824 2018年7月
Conjugated polymers incorporated with cycloplatinated complexes (P1-Pt and P2-Pt) were used as dispersants for single-walled carbon nanotubes (SWCNTs). Significant changes in the UV-vis absorption spectra were observed after the formation of the p...
The excited-state dynamics of pyrene incorporated into poly(substituted methylene)s is investigated by picosecond time-resolved fluorescence spectroscopy and femtosecond time-resolved near-IR absorption spectroscopy in the 900-1400 nm region. The ...
Biochimica et Biophysica Acta - General Subjects 1862(2) 335-357 2018年2月
Novel methodologies utilizing pulsed or intense CW irradiation obtained from lasers have a major impact on biological sciences. In this article, recent development in biophysical researches fully utilizing the laser irradiation is described for th...
2013 Korea - Japan Symposium on Frontier Photoscience (KJFP-2013), Invited Lecture 50, Hoam Faculty House, Seoul National University, Seoul , Korea 2013年
人文科学研究科
理学部