Near-field optical control of nonlinear properties of single quantum dots

Toshiharu Saiki; Kenichi Nishi

doi:10.1117/12.363848

22 September 1999 Near-field optical control of nonlinear properties of single quantum dots

Toshiharu Saiki, Kenichi Nishi

Proceedings Volume 3791, Near-Field Optics: Physics, Devices, and Information Processing; (1999) https://doi.org/10.1117/12.363848
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Near-field spectroscopy of self-assembled InGaAs single quantum dots (QDs) is described. For the application of near-field optical microscope to various versions of advanced spectroscopy of single QDs, the functional performance of a near-field fiber probe is much improved. By optimizing the structure of this probe, high sensitivity in signal detection, as well as high spatial resolution, is successfully achieved. In combination with a standard pump- probe spectroscopic techniques, we realize nonlinear absorption spectroscopy of single QDs at low temperature. The absorption cross section of a single QD is effectively modified by local injection of a few electrons into the QD. Employing a femtosecond pulsed laser, time-resolved photoluminescence spectroscopy is also performed.

Citation Download Citation

Toshiharu Saiki and Kenichi Nishi "Near-field optical control of nonlinear properties of single quantum dots", Proc. SPIE 3791, Near-Field Optics: Physics, Devices, and Information Processing, (22 September 1999); https://doi.org/10.1117/12.363848

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