Laser-scanning surface plasmon polariton resonance microscopy with multiple photodetectors.
We report the development of a laser-scanning surface plasmon resonance microscope equipped with multiple photodetectors. The system simultaneously obtains images that have different orientations to the specimen under examination, and the system can achieve a spatial resolution of 1.6 microm, which is shorter than the propagation length of the scanning surface plasmons, while high sensitivity to thickness and refractive-index distribution is retained. In addition, because the system uses a laser-scanning microscope, it can obtain high-contrast images. The measurable ranges of refractive-index distributions and thicknesses of specimens that can be measured are also discussed.
Tanaka
Takuo
T
Division of Advanced Electronics and Optical Science, Department of Physical Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531 Japan. tanaka@ee.es.osaka-u.ac.jp
Yamamoto
Sadahiko
S