Ultrafast nonlinearity in polydiacetylene microcrystals

R. Rangel-Rojo; H. Matsuda; Hitoshi Kasai; H. Nakanishi

doi:10.1117/12.525192

Ultrafast nonlinearity in polydiacetylene microcrystals

R. Rangel-Rojo, H. Matsuda, Hitoshi Kasai, H. Nakanishi

Polymer Hybrid Materials Research Center

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report the study of the dynamics of the third-order nonlinear optical response of polydiacetylene micro-crystals. The material employed is the polydiacetylene know as poly-DCHD, and the micro-crystals were 100 nm in diameter contained in an aqueous suspension. Experimental results for transient changes in transmission measured by a time-resolved excite-probe technique, conducted with l00fs pulses at 850 nm from a mode-locked Ti:sapphire laser are presented. A discussion of the role of the excitonic origin of the nonlinear response is also presented.

Original language	English
Number of pages	1
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4829 I
DOIs	https://doi.org/10.1117/12.525192
Publication status	Published - 2003 Dec 1
Event	19th Congress of the International Commisssion for Optics Optics for the Quality of Life - Firenze, Italy Duration: 2002 Aug 25 → 2002 Aug 30

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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AU - Kasai, Hitoshi

AU - Nakanishi, H.

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AB - We report the study of the dynamics of the third-order nonlinear optical response of polydiacetylene micro-crystals. The material employed is the polydiacetylene know as poly-DCHD, and the micro-crystals were 100 nm in diameter contained in an aqueous suspension. Experimental results for transient changes in transmission measured by a time-resolved excite-probe technique, conducted with l00fs pulses at 850 nm from a mode-locked Ti:sapphire laser are presented. A discussion of the role of the excitonic origin of the nonlinear response is also presented.

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