Longitudinal phonon plasmon mode coupling in β -Ga2O3
Abstract
In this letter, we investigate a set of n-type single crystals of monoclinic symmetry β-Ga2O3 with different free electron concentration values by generalized far infrared and infrared spectroscopic ellipsometry. In excellent agreement with our previous model prediction, we find here by experiment that longitudinal-phonon-plasmon coupled modes are polarized either within the monoclinic plane or perpendicular to the monoclinic plane. As predicted, all modes change the amplitude and frequency with the free electron concentration. The most important observation is that all longitudinal-phonon-plasmon coupled modes polarized within the monoclinic plane continuously change their direction as a function of free electron concentration.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 11, 2019
- Source ID
- 10.1063/1.5089145
Entities
People
- Alyssa Mock
- Günther Wagner
- John A. Woollam
- Ken Goto
- Marko J. Tadjer
- Mathias Schubert
- Rafał Korlacki
- Sean Knight
- Vanya Darakchieva
- Virginia D. Wheeler
- Zbigniew Galazka
Organizations
- Air Force Office of Scientific Research
- Leibniz Institute for Crystal Growth
- Leibniz Institute for Polymer Research
- Linköping University
- National Science Foundation Directorate for Engineering
- Novel Crystal Technology, Inc.
- Swedish Energy Agency
- United States Naval Research Laboratory
- University of Nebraska–Lincoln