Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2006-07-13
2008-11-11
Pak, Sung (Department: 2874)
Optical waveguides
Optical waveguide sensor
Reexamination Certificate
active
07450789
ABSTRACT:
The present invention provides an ultra-mini and low cost refractive index measuring device applicable to biochemical measurements of an extremely minute amount of a sample. The refractive index measuring device uses a photonic crystal without any requirement of an external spectrograph or the like.The micro sensor device according to the present invention includes a light source emitting light with a single wavelength, a microcavity in which a resonant wavelength varies depending on a position thereof. A refractive index of a material to be measured is measured based on positional information by detecting a transmitting position of light changing in response to a change of a refractive index of the measured material. The micro sensor device according to the present invention enables measurement of a refractive index of a material to be measured without using a large-scale spectrograph.
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E. Chow et al., Ultracompact biochemical sensor built with two-dimensional photonic crystal, Optics Letters vol. 29, No. 10, p. 1093-1095 (2004).
Arakawa Yasuhiko
Fukamachi Toshihiko
Hosomi Kazuhiko
Katsuyama Toshio
Yamada Hiroji
Antonelli, Terry Stout & Kraus, LLP.
Arakawa Yasuhiko
Hitachi , Ltd.
Katsuyama Toshio
Pak Sung
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