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Development of apertureless microscopy and force microscopy of GaN and CeO22


Bridger, Paul M. (1999) Development of apertureless microscopy and force microscopy of GaN and CeO22. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/8ybw-sh03.


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This thesis concentrates on the development of both novel scanning probes as well as novel applications of existing ones in three major areas. The first area is our development of apertureless microscopy and progress toward our goal of 1nm optical imaging and spectroscopy. Fundamental experiments and simulations of the apertureless imaging mechanism were conducted using nanosphere size standards. Fifteen nanometer resolution as well as optical property discrimination was demonstrated. The apertureless microscope was then used to investigate the near field optical structure of chromosomes and anti-reflective polymer thin films. The second area is the investigation of the electronic properties of the wide bandgap semiconductor GaN by atomic force microscopy. Defects in GaN were correlated to diffusion lengths as measured by electron beam induced current. Electric force microscopy (EFM), a varient of atomic force microscopy, was subsequently used to investigate sub [...] electric field gradient and surface potential variation associated with these defects. A novel application of EFM to measure the surface state density was also demonstrated. The third area is another novel application of EFM for localized charge storage in double barrier Ce02/Si/Ce02/Si structures which may have relevance for data storage and charge directed lithography.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • McGill, Thomas C.
Thesis Committee:
  • Unknown, Unknown
Defense Date:11 May 1999
Record Number:CaltechETD:etd-10122007-132811
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4057
Deposited By: Imported from ETD-db
Deposited On:25 Oct 2007
Last Modified:16 Apr 2021 23:09

Thesis Files

PDF (Bridger_pm_1999.pdf) - Final Version
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