Optical properties of cubic boron arsenide
Name
1911.04914.pdf
Description
Submitted version
Size
4.6 MB
Format
Adobe PDF
Checksum (MD5)
bf81ca0f71268167838cc54e43bfdff6
Author(s)
Song, Bai
Chen, Ke
Bushick, Kyle
Mengle, Kelsey A.
Tian, Fei
Gamage, Geethal Amila Gamage Udalamatta
Ren, Zhifeng
Kioupakis, Emmanouil
Chen, Gang
Date Issued
April 2020
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Song, Bai et al., "Optical properties of cubic boron arsenide." Applied Physics Letters 116, 14 (April 2020): no. 141903 ©2020 Author(s)
Version
Original manuscript
Abstract
The ultrahigh thermal conductivity of cubic boron arsenide (BAs) makes it a promising material for next-generation electronics and optoelectronics. Here, we report measured optical properties of BAs crystals, including the complex dielectric function, refractive index, and absorption coefficient in the ultraviolet, visible, and near-infrared wavelength range. The data were collected at room temperature using spectroscopic ellipsometry and transmission and reflection spectroscopy. We further calculated the optical response using density functional theory and many-body perturbation theory, considering quasiparticle and excitonic corrections. The computed values for the direct and indirect bandgaps (4.25 eV and 2.07 eV) agree well with the measured results (4.12 eV and 2.02 eV). Our findings pave the way for using BAs in future electronic and optoelectronic applications that take advantage of its demonstrated ultrahigh thermal conductivity and predicted high ambipolar carrier mobility. ©2020 Author(s).
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1063/5.0004666
