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Proceedings Paper

Intrinsic regime of exciton photophysics in ultra-clean carbon nanotubes bridging an air gap (presentation video)
Author(s): Ibrahim Sarpkaya; Zhengyi Zhang; William Walden-Newman; James Hone; Chee Wei Wong; Stefan Strauf
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Paper Abstract

We demonstrate a new regime of intrinsic exciton photophysics in SWCNTs with narrow spectral linewidth down to 200 μeV and prolonged spontaneous emission times up to T1=18 ns, about two orders of magnitude better than prior measurements and in agreement with values(10-100ns) hypothesized by theorists about a decade ago. Furthermore, we establish for the first time exciton decoherence times of individual nanotubes in the time domain and find fourfold prolonged values up to T2=2.1 ps compared with ensemble measurements. These first observations motivate new discussions about the magnitude of the intrinsic dephasing mechanism while the prolonged exciton dynamics is promising for applications.

Paper Details

Date Published: 18 November 2014
PDF: 1 pages
Proc. SPIE 9168, Carbon Nanotubes, Graphene, and Associated Devices VII, 91680L (18 November 2014); doi: 10.1117/12.2063300
Show Author Affiliations
Ibrahim Sarpkaya, Stevens Institute of Technology (United States)
Zhengyi Zhang, Columbia Univ. (United States)
William Walden-Newman, Stevens Institute of Technology (United States)
James Hone, Columbia Univ. (United States)
Chee Wei Wong, Columbia Univ. (United States)
Stefan Strauf, Stevens Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9168:
Carbon Nanotubes, Graphene, and Associated Devices VII
Manijeh Razeghi; Young Hee Lee; Maziar Ghazinejad, Editor(s)

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