Type of Document Master's Thesis Author Chandran, Ashwin Author's Email Address email@example.com URN etd-01092002-222206 Title Self-Assembled Multilayered Dielectric Spectral Filters Degree Master of Science Department Electrical and Computer Engineering Advisory Committee
Advisor Name Title Claus, Richard O. Committee Chair Scales, Wayne A. Committee Member Stolen, Roger Hall Committee Member Keywords
- Needle Filters
- Optical Thin Films
- Electro Static Self-Assembly
- Dielectric stack filter
Date of Defense 2001-09-19 Availability unrestricted AbstractThin film optical filters are made by depositing thin films of optical materials on a
substrate in such a way as to produce the required optical and mechanical properties. The
Electrostatic Self Assembly (ESA) process is accomplished by the alternate adsorption of
poly-anionic and poly-cationic molecules on progressive oppositely charged surfaces.
This technique offers several advantages such as ease of fabrication, molecular level
uniformity, stable multilayer synthesis and avoidance of the need for a vacuum
environment. The ESA process offers an excellent choice for manufacturing optical thin
film coatings due to its capability to incorporate multiple properties into films at the
molecular level and its ability to be a fast and inexpensive process. The ESA process, as a
method for manufacturing optical thin film filters has been investigated in detail in this
thesis. A specific design was made and analyzed using TFCalc, a commercial thin film
design software. Sensitivity analysis detailing the changes in filter response to errors in
thickness and refractive index produced by the ESA process were done. These proved
that with a high level of quality control, highly reliable and accurate optical thin films can
be made by the ESA process.
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