State-filling and self-action processes at resonant excitation of excitons in colloidal quantum dots

V. Dneprovskii; M. Kozlova; T. Wumaier; E. Zhukov; Sy Hieu Dau; A. Smirnov

doi:10.1117/12.881197

11 January 2011 State-filling and self-action processes at resonant excitation of excitons in colloidal quantum dots

V. Dneprovskii, M. Kozlova, T. Wumaier, E. Zhukov, Sy Hieu Dau, A. Smirnov

Proceedings Volume 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics; 79931R (2011) https://doi.org/10.1117/12.881197
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

Abstract

The anomalous nonlinear absorption of colloidal CdSe/ZnS quantum dots has been revealed in the case of resonant excitation of the basic exciton transition by powerful picosecond light pulses: bleaching at moderate input intensities is substituted by retardation of bleaching rate and even by increasing of absorption. The latter has been explained by saturation (state-filling) effect of two-level system with decreasing lifetime of the excited state at high excitation because of Auger recombination. The observed changes of output intensity cross-section profile versus exciting intensity were attributed to the creation of transparency channel in the cell with highly absorbing colloidal solution of quantum dots by laser beam due to state-filling, strip-effect and finally self-diffraction of Fresnel or Fraunhofer type by induced aperture.

Citation Download Citation

V. Dneprovskii, M. Kozlova, T. Wumaier, E. Zhukov, Sy Hieu Dau, and A. Smirnov "State-filling and self-action processes at resonant excitation of excitons in colloidal quantum dots", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79931R (11 January 2011); https://doi.org/10.1117/12.881197

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available