Widely Tunable Optical and Thermal Properties of Dirac Semimetal Cd3As2
Abstract
In this paper, a detailed analysis of the temperature‐dependent optical properties of epitaxially grown cadmium arsenide (Cd3As2), a newly discovered 3D Dirac semimetal is reported. Fermi level tuning—instigated from Pauli‐blocking in the linear Dirac cone—and varying Drude response, generate large variations in the mid‐ and far‐infrared optical properties. Thermo‐optic shifts larger than those of traditional III–V semiconductors are demonstrated. Electron scattering rate, plasma frequency edge, Fermi level shift, optical conductivity, and electron effective mass analysis of Cd3As2 thin‐films are quantified and discussed in detail. The ab initio density functional study and experimental analysis of epitaxially grown Cd3As2 promise applications for nanophotonic and nanoelectronic devices, such as reconfigurable metamaterials and metasurfaces, nanoscale thermal emitters, and on‐chip directional antennas.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 20, 2020
- Source ID
- 10.1002/adom.201901192
Entities
People
- Bolin Liao
- Hamid T Chorsi
- Jon A Schuller
- Manik Goyal
- Prasad P. Iyer
- Shengying Yue
- Susanne Stemmer
- Timo Schumann
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Office of Basic Energy Sciences
- United States Department of Defense
- United States Department of Energy
- University of California
- University of California, Santa Barbara