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Conference Paper
Frontiers in Optics
Orlando, Florida United States
October 6-10, 2013
ISBN: 978-1-55752-988-6
Postdeadline Session III (FW6C)

Optical transitions in topological insulator quantum dots

Thakshila M. Herath, Prabath Hewageegana, and Rick Trebino  »View Author Affiliations


http://dx.doi.org/10.1364/FIO.2013.FW6C.2


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Abstract

We study the optical properties of quantum dots in topological insulator nanofilm. The quantum dots have cylindrical shape and are realized as a region of larger thickness of the nanofilm. The energy spectra of quantum dots depend on their size and the thickness of nanofilm. There are two types of optical transitions in topological insulator quantum dots: interband and intraband transitions with corresponding energies around 400 meV and 50 meV for quantum dot of radius ≈ 10 nm (for Ti2Se3 topological insulator). The intensities of intraband transitions are almost an order of magnitude larger than the intensities of interband transitions.

© 2013 OSA

OCIS Codes
(160.4760) Materials : Optical properties
(230.5590) Optical devices : Quantum-well, -wire and -dot devices

Citation
T. M. Herath, P. Hewageegana, and R. Trebino, "Optical transitions in topological insulator quantum dots," in Frontiers in Optics 2013 Postdeadline, I. Kang, D. Reitze, N. Alic, and D. Hagan, eds., OSA Postdeadline Paper Digest (online) (Optical Society of America, 2013), paper FW6C.2.
http://www.opticsinfobase.org/abstract.cfm?URI=FiO-2013-FW6C.2


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