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Mohit Pradhan - Master Thesis Final Revised7.34 MB
Embargoed Access, Embargo ends: 01/23/2027
Thesis
Studying polaritons in low symmetry materials through attenuated total reflectance (ATR) spectroscopy
University of Iowa
Master of Science (MS), University of Iowa
Autumn 2025
DOI: 10.25820/etd.008212
Abstract
This comprehensive document explores the polaritons in low-symmetry anisotropic materials, and the methods developed to study them. We use Fourier transform infrared (FTIR) reflectance spectroscopy to study the infrared optical phonons of the monoclinic crystals BiBO and bGO, and FTIR attenuated total reflectance (ATR) spectroscopy to induce surface phonon polaritons within the materials. Utilizing our reflectance spectroscopy we create an optical model for BiBO and obtain its dielectric function tensor. From the dielectric function tensor we simulate light propagation to characterize the surface phonon polaritons.
Details
- Title: Subtitle
- Studying polaritons in low symmetry materials through attenuated total reflectance (ATR) spectroscopy
- Creators
- Mohit Pradhan
- Contributors
- Thomas G. Folland (Advisor)John P. Prineas (Committee Member)Denis R. Candido (Committee Member)Joshua D. Caldwell (Committee Member)
- Resource Type
- Thesis
- Degree Awarded
- Master of Science (MS), University of Iowa
- Degree in
- Physics
- Date degree season
- Autumn 2025
- DOI
- 10.25820/etd.008212
- Publisher
- University of Iowa
- Number of pages
- vii, 41 pages
- Copyright
- Copyright 2025 Mohit Pradhan
- Language
- English
- Date submitted
- 12/04/2025
- Description illustrations
- Illustrations, graphs, charts, tables
- Description bibliographic
- Includes bibliographical references (pages 37-38).
- Public Abstract (ETD)
This research explores how an exotic form of hybrid light-matter wave (polaritons) form in crystals with low-symmetry structure. By studying light propagation in low symmetry crystals to find the conditions for the hybrid waves, and how the crystal structure impact the wave. By understanding these hybrid waves, we shall be able to control light better and create improved infrared sensors and emitters.
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9985135047802771
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