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Abstract by Brittany England

Personal Infomation


Presenter's Name

Brittany England

Degree Level

Masters

Co-Authors

Courtney Johnnson
Blake Dastrup

Abstract Infomation


Department

Chemistry and Biochemistry

Faculty Advisor

Jeremy Johnson

Title

Colorful Measurements of Phonon-Polariton Dispersion

Abstract

When light (polariton) couples to a vibration (phonon) in a polar crystalline material, it may form a phonon-polariton. How the phonon-polariton frequency changes with wavevector is described by the phonon-polariton dispersion curve. Understanding the dispersion curve of phonon-polaritons is key to better understanding how light can dynamically influence structure in crystals such as lithium niobate. We introduce a new method of recording the phonon-polariton dispersion curve over a much broader range than previously possible, by varying the pump wavelength from 450nm to 2000nm and probing at 800nm. Mapping out the phonon-polariton dispersion curve of different materials is important for fundamental understanding of their properties and also can help drive promising applications in future technology.