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Proceedings Paper

Near-field optical control of nonlinear properties of single quantum dots
Author(s): Toshiharu Saiki; Kenichi Nishi
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Paper 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.

Paper Details

Date Published: 22 September 1999
PDF: 10 pages
Proc. SPIE 3791, Near-Field Optics: Physics, Devices, and Information Processing, (22 September 1999); doi: 10.1117/12.363848
Show Author Affiliations
Toshiharu Saiki, Kanagawa Academy of Science and Technology (Japan)
Kenichi Nishi, NEC Corp. (Japan)


Published in SPIE Proceedings Vol. 3791:
Near-Field Optics: Physics, Devices, and Information Processing
Suganda Jutamulia; Motoichi Ohtsu; Toshimitsu Asakura, Editor(s)

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