Sensors 2010, 10(5), 4253-4269; doi:10.3390/s100504253
Real-Time Time-Frequency Two-Dimensional Imaging of Ultrafast Transient Signals in Solid-State Organic Materials
1
Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
2
Interdisciplinary Research Center, Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
*
Author to whom correspondence should be addressed.
Received: 28 February 2010 / Revised: 18 March 2010 / Accepted: 5 April 2010 / Published: 28 April 2010
(This article belongs to the Special Issue Laser Spectroscopy and Sensing)
Abstract
In this review, we demonstrate a real-time time-frequency two-dimensional (2D) pump-probe imaging spectroscopy implemented on a single shot basis applicable to excited-state dynamics in solid-state organic and biological materials. Using this technique, we could successfully map ultrafast time-frequency 2D transient absorption signals of β-carotene in solid films with wide temporal and spectral ranges having very short accumulation time of 20 ms per unit frame. The results obtained indicate the high potential of this technique as a powerful and unique spectroscopic tool to observe ultrafast excited-state dynamics of organic and biological materials in solid-state, which undergo rapid photodegradation.Keywords:
femtosecond; imaging; single-shot; pump-probe transient absorption spectroscopy; β -carotene; organic materials; biological materials; photodegradation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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MDPI and ACS Style
Takeda, J.; Ishida, A.; Makishima, Y.; Katayama, I. Real-Time Time-Frequency Two-Dimensional Imaging of Ultrafast Transient Signals in Solid-State Organic Materials. Sensors 2010, 10, 4253-4269.