Thesis
FDTD measurement of the reflection coefficient associated with total internal reflection from gainy Lorentzian media
Washington State University
Master of Science (MS), Washington State University
2008
Handle:
https://hdl.handle.net/2376/102382
Abstract
The magnitude of the Fresnel reflection coefficient for total internal reflection (TIR) from a gainy medium has been a subject of controversy for over 40 years. We study the reflection coefficient from a half-space filled with a gainy or lossy Lorentzian medium using the finite-difference time-domain (FDTD) method. For comparison, a separate measurement is taken from a half space using the same configuration but with a medium of constant material parameters. The results show that the Fresnel reflection coefficient from a gainy half space is larger than unity upon TIR for incidence of above the critical angle and is smaller than unity for incidence below the critical angle. There is no difference in the reflection coefficients from a gainy (or lossy) Lorentzian half space with a gainy (or lossy) half space of constant coefficients. For reflection coefficient problems, materials with constant coefficients can be used to approximate a Lorentzian material at a single frequency.
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Details
- Title
- FDTD measurement of the reflection coefficient associated with total internal reflection from gainy Lorentzian media
- Creators
- Abulikemu Tuerxunjiang
- Contributors
- John B. Schneider (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Physics and Astronomy, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525143901842
- Language
- English
- Resource Type
- Thesis