Light measuring apparatus employing optical electric field enhancing device
AssigneeFUJIFILM Corporation
InventorsShogo Yamazoe, Masayuki Naya, Megumi Shiota
Life of this patent
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Abstract
Using an optical electric field enhancing device including a fine uneven structure made of gold formed on the front surface of a transparent substrate, illumination light of a wavelength in the range from 400 to 530 nm is applied at least to an analyte, positional information of the analyte is detected by a position detection unit disposed on the rear surface side of the optical electric field enhancing device, and excitation light is applied to the detected position by an excitation light application unit. Signal light emitted from the analyte when the excitation light is applied is detected from the rear surface side of the transparent substrate.
Claims11
A measuring apparatus comprising:
- an optical electric field enhancing device comprising a transparent substrate, and a fine uneven structure made of gold formed on a front surface of the transparent substrate, wherein the fine uneven structure made of gold is capable of inducing localized plasmons when excitation light is applied, and an analyte is placed on a surface of the fine uneven structure;
- an illumination optical system for applying illumination light only of a wavelength in a range from 400 to 530 nm at least to the analyte;
- a position detection unit disposed on a rear surface side of the optical electric field enhancing device, the position detection unit detecting a position of the analyte by detecting, from the rear surface side of the transparent substrate, light emitted from the analyte when the illumination light is applied to the analyte;
- an excitation light application unit for applying excitation light to the position on the optical electric field enhancing device;
- and
- a light detection unit disposed on the rear surface side of the optical electric field enhancing device, the light detection unit detecting, from the rear surface side of the transparent substrate, signal light emitted from the analyte when the excitation light is applied,
- wherein the optical electric field enhancing device comprises a transparent substrate having a fine uneven structure on the front surface thereof, and a fine uneven structure made of gold formed on the front surface of the transparent substrate, and
- wherein a main component of the fine uneven structure of the transparent substrate is a metal hydroxide, or a hydroxide of a metal oxide.
Dependencies are inferred from the claim text.