• Publications
  • Influence
Infrared absorption signature on laser-damaged optical thin films.
Optical coating degradation under laser irradiation can take several forms. Perhaps the most common that is not due to particulates is thermal breakdown, caused by heating of the coating to aExpand
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Fabrication and operation of an electrostatic actuator for controlling nanometer-scale gaps in collapsed cantilever heterostructures
Vertical electrostatic wedge actuators are described that control nanometer-scale gaps between surfaces. Standard parallel-plate electrostatic actuators become difficult to stabilize across extremelyExpand
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Coupling of quantum states with mechanical heterostructures
Mechanical positioning is used to control the wavelength of light emission from semiconductor heterostructures. In our work, a SixN/InP cantilever containing an InGaAs surface well collapses overExpand
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Band-gap tuning with mechanical heterostructures
Two surface quantum wells in a collapsed heterostructure couple across an air gap of variable width. Experiments demonstrate a tuning range of 22 nm with the potential for up to 225 nm.
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In situ laser reflectance measurement of diffuse surfaces.
  • W. Chan, S. Khan
  • Materials Science, Medicine
  • Applied optics
  • 1 August 1978
Report is made on an in situ method of laser reflectance measurement of diffuse surfaces by using a GaAs laser and off-the-shelf optical components not involving radiation integration over aExpand
  • 3
Electrostatic actuator for coupling quantum well electron states
An actuator was designed and fabricated to actively tune the nanometer-scaled gap between quantum wells in a collapsed cantilever structure. Maximum actuation of 55nm was achieved. PhotoluminescenceExpand
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Compact field-deployable automated c-axis analyzer for ice thin sections
Automated c-axis analyzers are a critical tool for harvesting large-scale ice crystal orientation data from thin section analysis, but existing examples are not designed for deployment into the fie...
MEMS Actuators for Tuning Nanometer-scale Airgaps in Heterostructures and Optical Instrumentation for Glacier Ice Studies
University of Minnesota Ph.D. dissertation. January 2016. Major: Electrical Engineering. Advisor: Joseph Talghader. 1 computer file (PDF); ix, 116 pages.
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