Surface plasmon sensor

Details Surface plasmon sensor Surface plasmon sensor

1998-04-29

1999-07-20

Font, Frank G.

Optics: measuring and testing

Of light reflection

356334, 356364, 356137, 356135, G01N 2155

Patent

active

059262842

ABSTRACT:
A surface plasmon sensor comprises a prism, a metal film, which is formed on one surface of the prism and is brought into contact with a sample, and a light source for producing a light beam. An optical system causes the light beam to pass through the prism and to impinge upon an interface between the prism and the metal film such that various different angles of incidence may be obtained with respect to the interface. A photodetector detects an intensity of the light beam, which has been totally reflected from the interface, with respect to each of the various different angles of incidence. An electrode stands facing the metal film with a liquid sample intervening therebetween, and a DC voltage is applied across the electrode and the metal film. A substance contained in the liquid sample is thus analyzed quickly and with a high sensitivity.

REFERENCES:
patent: 5351127 (1994-09-01), King et al.
patent: 5633724 (1997-05-01), King et al.
"Wall-Induced Orientational Order of a Liquid Crystal in the Isotropic Phase-an Evanescent-Wave-Ellipsometry Study", Hsiung et al., Physical Review Letters, vol. 57, No. 24, Dec. 15, 1986, pp. 3065-3068.

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