Effects of Dissipation on Propagation of Surface Electromagnetic and Acoustic Waves Page: 2
The following text was automatically extracted from the image on this page using optical character recognition software:
Nagaraj, Nagaraj. Effects of dissipation on propagation of surface electromagnetic
and acoustic waves. Doctor of Philosophy (Physics), May 2012, 72 pages, 27 illustrations,
references, 64 titles.
With the recent emergence of the field of metamaterials, the study of
subwavelength propagation of plane waves and the dissipation of their energy either in the
form of Joule losses in the case of electomagnetic waves or in the form of viscous
dissipation in the case of acoustic waves in different interfaced media assumes great
importance. With this motivation, I have worked on problems in two different areas, viz.,
plasmonics and surface acoustics.
The first part (chapters 2 & 3) of the dissertation deals with the emerging field of
plasmonics. Researchers have come up with various designs in an efort to fabricate
efficient plasmonic waveguides capable of guiding plasmonic signals. However, the inherent
dissipation in the form of Joule losses limits efficient usage of surface plasmon signal. A
dielectric-metal-dielectric planar structure is one of the most practical plasmonic structures
that can serve as an efficient waveguide to guide electromagnetic waves along the metal-
dielectric boundary. I present here a theoretical study of propagation of surface plasmons
along a symmetric dielectric-metal-dielectric structure and show how proper orientation of
the optical axis of the anisotropic substrate enhances the propagation length. An equation
for propagation length is derived in a wide range of frequencies. I also show how the
frequency of coupled surface plasmons can be modulated by changing the thickness of the
metal film. I propose a Kronig-Penny model for the plasmonic crystal, which in the long
wavelength limit, may serve as a homogeneous dielectric substrate with high anisotropy
which do not exist for natural optical crystals.
Here’s what’s next.
This dissertation can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Dissertation.
Nagaraj, Nagaraj. Effects of Dissipation on Propagation of Surface Electromagnetic and Acoustic Waves, dissertation, May 2012; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc115126/m1/2/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; .