Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Reexamination Certificate
2004-01-05
2009-08-04
Gakh, Yelena G (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
C422S082060, C422S082070, C422S082080, C422S082090
Reexamination Certificate
active
07569188
ABSTRACT:
A nanostructure is used to generate a highly localized nanoscale optical field. The field is excited using surface plasmon amplification by stimulated emission of radiation (SPASER). The SPASER radiation consists of surface plasmons that undergo stimulated emission, but in contrast to photons can be localized within a nanoscale region. A SPASER can incorporate an active medium formed by two-level emitters, excited by an energy source, such as an optical, electrical, or chemical energy source. The active medium may be quantum dots, which transfer excitation energy by radiationless transitions to a resonant nanosystem that can play the same role as a laser cavity in a conventional laser. The transitions are stimulated by the surface plasmons in the nanostructure, causing the buildup of a macroscopic number of surface plasmons in a single mode.
REFERENCES:
Kulakovich et al. “Enhanced Luminescence of CdSe Quantum Dots on Gold Colloids”, NanoLetters, 2002, v. 2, No. 12, pp. 1449-1452, published on Web Nov. 7, 2002.
Shimizu et al. “Surface-Enhanced Emission from Single Semiconductor Nanocrystals”, Phys. Rev. Lett, Sep. 2002, v. 89, No. 11., pp. 117401-1—117401-4.
Gryczynski et al. “Surface-plasmon Coupled Emission of Quantum Dots”, J. Phys. Chem. B, 2005, v. 109, pp. 1088-1093.
Stockman et al.;Localization versus Delocalization of Surface Plasmons in Nanosystems: Can One State Have Both Characteristics?; Physical Review Letters; vol. 87, No. 16; (Oct. 15, 2001); pp. 167401-1-167401-4.
Bergman David J.
Stockman Mark I.
Gakh Yelena G
King & Spalding LLP
Ramot At Tel-Aviv University Ltd
The Georgia State University Research Foundation
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