| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and method for examining the identity of chemical groups. SOLUTION: The present apparatus (35) includes a substrate (80) having a plasmon resonant surface on which the sample (82) is supported, a source of a beam of light, and a lens assembl having a tip region and a nanolens (62), and the nanolens (62) is 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 (62) and a confronting detection region on the substrate surface (80) when the gap between the nanolens (62) and the substrate (80) is 30-nm or less. A focusing mechanism in the apparatus operates to move the lens assembly toward and away from the substrate surface (80), with a gap of less than 30-nm, to produce electromagnetic gap modes that enhance the Raman spectroscopy signals produced by the sample (82) in the detection region. COPYRIGHT: (C)2011,JPO&INPIT
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