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Stark-Induced Optical Nonlinearity in Gaseous NH₂D and Optical Waves in Layered Media


Yeh, Pochi Albert (1978) Stark-Induced Optical Nonlinearity in Gaseous NH₂D and Optical Waves in Layered Media. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/MBFM-X335.


The first part of this work describes theoretical and experimental studies of Stark-induced three-wave mixing in gaseous NH2D. Application of a dc electric field to a gaseous system destroys the basic inversion symmetry and allows two-photon mixing processes to occur. A theoretical derivation of this effect under conditions of resonantly enhanced non-linearities is given for a three-level system. Calculations are presented for mixing of a CO2 laser with a 4 GHz microwaves in the molecule NH2D, producing single lower sideband radiation.

Experimental observation of resonantly enhanced, dc-induced, three-wave mixing in gaseous NH2D is presented. The dependence of this effect on gas pressure, microwave frequency, applied dc field, and microwave power are presented and compared with theoretical predictions. The experiment was done at Hughes Research Laboratories by Abrams and his coworkers.

The second part of this work describes the propagation of electromagnetic waves in periodic layered media. The propagation of electromagnetic radiation in periodically stratified media is considered. Media of finite, semi-finite and infinite extent are treated. A diagonalization of the unit cell translation operator is used to obtain exact solutions for the Bloch waves, the dispersion relations, and the band structure of the medium.

The theory of electromagnetic Bloch waves in periodic stratified media is then applied to the problems of birefringence, and group velocity in these media. The relevance of periodic media to phase matching in nonlinear mixing experiments-and to laser action in the x-ray region is discussed.

New types of guided waves such as Bragg guided waves and optical surface waves are theoretically predicted and experimentally observed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics ; Applied Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Yariv, Amnon
Thesis Committee:
  • Yariv, Amnon (chair)
  • Feynman, Richard Phillips
  • Mathews, Jon
  • Papas, Charles Herach
Defense Date:30 September 1977
Non-Caltech Author Email:Pochi (AT)
Funding AgencyGrant Number
Office of Naval ResearchUNSPECIFIED
Record Number:CaltechTHESIS:12072017-095000115
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10595
Deposited By: Benjamin Perez
Deposited On:08 Dec 2017 16:07
Last Modified:04 Oct 2019 00:19

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