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| Title: | Field-induced control of universal fluorescence intermittency of a quantum dot light emitter |
| Authors: | Lee, J. D.
Maenosono, S. |
| Keywords: | Colloidal quantum dot
Fluorescence intermittency
Blinking |
| Issue Date: | 2010-08-17 |
| Publisher: | American Institute of Physics |
| Magazine name: | Journal of Chemical Physics |
| Volume: | 133 |
| Number: | 7 |
| Start page: | 074703-1 |
| End page: | 074703-7 |
| DOI: | 10.1063/1.3479578 |
| Abstract: | With the nonstochastic quantum mechanical study of a quantum dot light emitter, we find that fluorescence intermittency statistics are universal and insensitive to the microscopic nature of the tunneling fluctuation between quantum dot and trapping state. We also investigate the power-law exponent θ and the crossover time τ_C of the on-time (τ_<on>) probability P(τ_<on>)^∝τ^<−θ>_<on> (for τ_<on> ≲ τ_C) and ∝e^<−Γτon> (for τ_<on> ≳ τ_C) under an optical field of given energy and strength. For easy off-resonance excitation, it is found in both numerical and analytic ways that τC−1 is proportional to the intensity of the optical field (i.e., the square of the field strength) independent of the internal parameters of a quantum dot. Furthermore, it is also found that θ = 2 in the limit of vanishing field strength is the upper bound of the exponent and θ becomes less than 2 as the field strength increases. |
| Rights: | Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. D. Lee and S. Maenosono, Journal of Chemical Physics, 133(7), 074703 (2010) and may be found at http://link.aip.org/link/doi/10.1063/1.3479578 |
| URI: | http://hdl.handle.net/10119/10305 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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