Accession Number : ADD015796

Title :   Method and Apparatus for Performing Scanning Tunneling Optical Absorption Spectroscopy.

Descriptive Note : Patent, filed 20 Dec 91, patented 30 Mar 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Glembocki, Orest J ; Snow, Eric S

Report Date : 30 Mar 1993

Pagination or Media Count : 7

Abstract : An apparatus for performing scanning tunneling optical absorption spectroscopy includes a scanning tunneling microscope tip positioned at a tunneling distance over a surface portion of a sample to be analyzed, biasing apparatus for producing in electric potential between said scanning tunneling microscope tip and said surface portion sufficient to cause a tunneling current to flow between said scanning tunneling microscope tip and said surface portion, illumination apparatus for illuminating said surface portion with modulated monochromatic light, and a detector for detecting an AC component of the tunneling current resulting from the modulated monochromatic light.

Descriptors :   *ABSORPTION, *SCANNING, *SPECTROSCOPY, *TUNNELING, *PATENTS, *OPTICS, DETECTORS, ILLUMINATION, LIGHT, MICROSCOPES, MONOCHROMATIC LIGHT, SURFACES, VOLTAGE, ELECTRIC CURRENT, MODULATION, SPATIAL DISTRIBUTION, RESOLUTION

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Optics
      Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE