Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Reexamination Certificate
2006-12-19
2006-12-19
Evans, F. L. (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
C435S287200, C435S288700
Reexamination Certificate
active
07151598
ABSTRACT:
Apparatus and method for examining the identity of chemical groups in a sample are disclosed. The apparatus has a substrate having a plasmon resonant surface on which the sample is supported, a source of a beam of light, and a lens assembly having a tip region and a nanolens composed of one or more plasmon resonance particles (PRPs) on the tip region. The PRPs are arranged to produce near-field electromagnetic gap modes in a space between the nanolens and a confronting detection region on the substrate surface when the gap between the nanolens and substrate is 30 nm or less. A focusing mechanism in the apparatus operates to move the lens assembly toward and away from the substrate surface, with a gap of less than 30 nm, to produce electromagnetic gap modes that enhance the Raman spectroscopy signals produced by the sample in the detection region.
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patent: 5479024 (1995-12-01), Hillner et al.
patent: 6002471 (1999-12-01), Quake
patent: 6441359 (2002-08-01), Cozier et al.
patent: 6850323 (2005-02-01), Anderson
Copy of International Search Report from PCT Application No. PCT/US04/10544.
Evans F. L.
Perkins Coie LLP
Poponin Vladimir
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