Instrumentation for Ultrahigh Resolution Temporal and Spatial Studies of Materials and Devices

Abstract

This contract provided support for the procurement of equipment to build and operate improved near-field scanning optical microscopes (NSOMs). Improved scanning stages were constructed, and a scheme for high speed scanning developed based on distance regulation with tuning forks. In this scheme the phase of the drive to the fork is monitored with a digital phase-locked loop, which allows very rapid adjustment of the fork position in response to damping changes that occur as the fork and optical fiber tip are scanned in close proximity to a surface. In addition, new excitation and detection schemes were developed, which have allowed us to pioneer the use of nonlinear NSOM for the study of ferroelectric and ferromagnetic domains, and the crystal structure of surfaces.

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Document Details

Document Type
Technical Report
Publication Date
Jan 02, 2001
Accession Number
ADA386974

Entities

People

  • Christopher C. Davis

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Crystal Structure
  • Detection
  • Domain Walls
  • Electro-Optics
  • Electromagnetic Fields
  • Energy Bands
  • Laser Beams
  • Light (Electromagnetic Radiation)
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Nonlinear Optics
  • Optical Phenomena
  • Optical Properties
  • Optics
  • Piezoceramics
  • Surface Plasmon Polaritons

Fields of Study

  • Physics

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