Optical Study of the Topological Semimetal Bi4Se3

Optical Study of the Topological Semimetal Bi4Se3



Margaret Brown


Presentation: 9:00 a.m.-10:15 a.m., Kennedy Union Ballroom

Additional authors:
Margaret Brown1,2, Ryan Laing1,2, Tobin Muratore1,2, Katherine Burzynski2,3, Jeff Brown2,4, Joseph Corbett2,5, Kurt Eyink2, Said Elhamri1,2, and Amber Reed2.

1. Department of Physics, University of Dayton, Dayton, OH 45469
2. Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base 45433
3. Azimuth, 2970 Presidential Dr, Suite 200, Fairborn, OH 45324
4. KBR, 2601 Mission Point Blvd, Suite 300, Beavercreek, Ohio 45431
5. UES, Inc., 4401 Dayton-Xenia Rd, Dayton, Ohio 45432



Quantum confinement of the topological semimetal Bi4Se3 was observed as a giant enhancement of the optical bandgap in two characteristic length-reducing regimes: ultra-thin films and nanoplatelets. The films were prepared via DC magnetron sputtering and characterized using atomic force microscopy and ultraviolet-visible spectroscopy. Current work investigates correlations of reduced dimensionality to enhancements of the bandgap. By characterizing the dimensionality through microscopy, spectroscopy results can be mapped to changes in the band edge as determined through Tauc plots.

Publication Date


Project Designation

Independent Research

Primary Advisor

Said Elhamri

Primary Advisor's Department



Stander Symposium project, College of Arts and Sciences

Optical Study of the Topological Semimetal Bi4Se3