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Demonstrating nanophotonic switching using near‐field pump–probe photoluminescence spectroscopy of CuCl quantum cubes
Author(s) -
Kawazoe T.,
Kobayashi K.,
Sangu S.,
Ohtsu M.
Publication year - 2003
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.2003.01125.x
Subject(s) - photoluminescence , spectroscopy , nanophotonics , optoelectronics , materials science , field (mathematics) , quantum dot , optical switch , optics , physics , quantum mechanics , mathematics , pure mathematics
Summary We demonstrated a novel optical switching operation using three CuCl quantum cubes with a size ratio of . Their quantized excitonic energy levels resonate with one another, and the switching mechanism was based on the resonant near‐field energy transfer between the quantum cubes. Using near‐field pump–probe photoluminescence spectroscopy, we succeeded in controlling the near‐field energy transfer and obtained a controlled (i.e. switched) signal in a differential photoluminescence spectrum with and without a pump beam. The internal quantum efficiency of the switching operation was close to 1. These results suggest the possibility of making a nanophotonic switching device smaller than 30 nm.