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Double walled carbon nanotubes as ultrafast optical switches

Kamaraju, N and Kumar, Sunil and Kim, Y A and Hayashi, T and Muramatsu, H and Endo, M and Sood, A K (2009) Double walled carbon nanotubes as ultrafast optical switches. In: Applied Physics Letters, 95 (8). 081106-081109.

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Abstract

Pristine and molybdenum filled double walled carbon nanotubes (DWNTs) suspended in D2O show excellent ultrafast optical switching properties investigated through femtosecond Z-scan and degenerate pump-probe method using 50 fs pulses with central photon energy of 1.57 eV. For pristine-DWNT, the two photon absorption coefficient, beta and nonlinear refraction coefficient, n2 are 4.9×10−8 cm/W, and 9.5×10−11 cm2/W, respectively, which yield one photon figure of merit, W=133 and two photon figure of merit, T=0.4. The degenerate pump-probe measurements show strong photoinduced bleaching with biexponential decay with time constants ~150 and 600 fs. ©2009 American Institute of Physics

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Keywords: absorption coefficients; carbon nanotubes;high-speed optical techniques;molybdenum;optical saturable absorption;optical switches;refractive index.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 Oct 2009 06:28
Last Modified: 19 Sep 2010 05:46
URI: http://eprints.iisc.ernet.in/id/eprint/23676

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