Open AccessBroadband near UV to visible optical activity measurement using self-heterodyned method
Author(s) -
Intae Eom,
Sung Hyun Ahn,
Hanju Rhee,
Minhaeng Cho
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.010017
Subject(s) - optics , ultrashort pulse , supercontinuum , beam splitter , broadband , physics , circular polarization , polarization (electrochemistry) , femtosecond , detector , light beam , optoelectronics , optical fiber , laser , chemistry , photonic crystal fiber , microstrip
We demonstrate that broadband electronic optical activity can be measured with supercontinuum light pulse generated by a femtosecond pump (800 nm). It is the self-heterodyned detection technique that enables us to selectively measure the real (optical rotatory dispersion, ORD) or imaginary (circular dichroism, CD) part of the chiroptical susceptibility by controlling the incident polarization state. The single-shot-based measurement that is capable of correcting power fluctuations of the continuum light is realized by using a fast CCD detector and a polarizing beam splitter. Particularly, non-differential scheme used does not rely on any polarization-switching components. We anticipate that this broadband CD/ORD spectrometry with intrinsically ultrafast time-resolution will be applied to a variety of ultrafast chiroptical dynamics studies.