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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume 39, Issue 1, Pages 310-315Publisher
JAPAN J APPLIED PHYSICS
DOI: 10.1143/JJAP.39.310
Keywords
circular dichroism; microscopy; modulation spectroscopy; polarizing undulator
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A new type of scanning microscope for observing circular dichroism (CD) images of samples was developed. As an illuminating light source, a polarizing undulator which generates right- and left-handed circularly polarized synchrotron radiations (SR) alternately, was used in the microscope. The SR from the polarizing undulator was focused to form a microbeam with a spot size of less than 1 mu m, by axially symmetric mirrors. The sense of rotation of circular polarization of the undulator radiation was modulated with a frequency of about 2 Hz. Two-dimensional CD images of a thin film of d-10-camphorsulfonic acid, which is one of the standard samples used for measuring a CD spectrum, were obtained by this microscope.
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