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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 2049–2051

Large prolongation of free-exciton photoluminescence decay in diamond by two-photon excitation

Martin Kozák, František Trojánek, and Petr Malý  »View Author Affiliations


Optics Letters, Vol. 37, Issue 11, pp. 2049-2051 (2012)
http://dx.doi.org/10.1364/OL.37.002049


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Abstract

We report on time-resolved photoluminescence of a free-exciton in IIa chemical vapor deposition diamond crystal. Large difference between decay times for one- and two-photon excitation processes was observed. The longest room-temperature exciton photoluminescence lifetime τFE=220ns was obtained under two-photon excitation with a photon energy of 4.7 eV. The role of diffusion and surface recombination velocity in exciton photoluminescence dynamics was studied using a new optical method based on two-photon excited time-resolved photoluminescence. The measured room-temperature value of diffusion coefficient in diamond was D=40cm2/s.

© 2012 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Spectroscopy

History
Original Manuscript: November 9, 2011
Revised Manuscript: April 19, 2012
Manuscript Accepted: April 19, 2012
Published: May 30, 2012

Citation
Martin Kozák, František Trojánek, and Petr Malý, "Large prolongation of free-exciton photoluminescence decay in diamond by two-photon excitation," Opt. Lett. 37, 2049-2051 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-11-2049

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