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The Japan Society of Applied Physics

Three-pulse photon echo measurements on nitrogen delta-doped GaAs

Yuichi Takubo, Hikaru Ishizawa, Yoshiki Sakuma, Michio Ikezawa

Published Jan 25, 2019• 0 citations
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The first observation is reported of the primary femtosecond photon echo at a liquid nitrogen temperature in a dye-doped polymer film at a wavelength of 780 nm. Echo signals were generated by pulses with the duration of 130 fs. The echo signal decay can not be described by a simple exponential function. There is a fast decay region below 250-300 fs and a slow decay region at longer time intervals. There were also detected signals of the self-diffraction of exciting pulses on a nonequilibrium population difference grating, induced in resonant medium by these pulses.

Laser Physics Letters•Oct 7, 2004•12 citations
We studied optical properties of isoelectronic traps in nitrogen δ-doped GaAs by micro-photoluminescence (µ-PL) spectroscopy. We found that these nitrogen impurity centers (NNA) emit photons with nearly identical emission energy at 1475 meV and polarization direction. Furthermore, single photon generation from a single impurity center was confirmed by a strong photon antibunching under the continuous optical excitation at 5 K. Our results suggest that the nitrogen impurity center in GaAs might be well suited for the energetically-defined single photon source for the quantum information application.
We studied optical properties of isoelectronic traps in nitrogen δ-doped GaAs by micro-photoluminescence (µ-PL) spectroscopy. We found that these nitrogen impurity centers (NNA) emit photons with nearly identical emission energy at 1475 meV and polarization direction. Furthermore, single photon generation from a single impurity center was confirmed by a strong photon antibunching under the continuous optical excitation at 5 K. Our results suggest that the nitrogen impurity center in GaAs might be well suited for the energetically-defined single photon source for the quantum information application.
The first observation is reported of the primary femtosecond photon echo at a liquid nitrogen temperature in a dye-doped polymer film at a wavelength of 780 nm. Echo signals were generated by pulses with the duration of 130 fs. The echo signal decay can not be described by a simple exponential function. There is a fast decay region below 250-300 fs and a slow decay region at longer time intervals. There were also detected signals of the self-diffraction of exciting pulses on a nonequilibrium population difference grating, induced in resonant medium by these pulses.