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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Tailor-made Radiation From Squeezed Atoms

Hiroki Saito, Masahito Ueda

Published Jan 1, 1997• 0 citations
Publisher
DOI
10.1109/cleopr.1997.610710

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This paper develops an idea of manipulating the squeezed atom state to generate a few-photon state whose phase or photon-number fluctuations are prescribed at our disposal. The squeezed atom state is a collective atomic state whose quantum fluctuations in population difference or collective dipole are smaller than those of the coherent atom state. It is shown that the squeezed atom state can be generated by the interaction of atoms with a coherent state of the electromagnetic field, and that it can be used as a tunable source of squeezed radiation. A variety of squeezed states including the photonnumber squeezed state and the phase squeezed state can be produced by manipulating the atomic state. This is owing to the fact that quantumstatistical information of the atomic state is faithfully transferred to that of the photon state. Possible experimental situations to implement our theory are discussed.
We present the experimental results on the squeezing of photon-number fluctuations in tailor-made light-emitting diodes (LED’s). In the LED, a highly p-doped separate confinement heterostructure is adopted as the active region to shorten the radiative recombination lifetime. In addition, a photodiode is monolithically integrated with the LED to enhance the photon-collection efficiency, which allows strong squeezing. The squeezing below the standard quantum-limit level over a wide frequency range, near-dc to 300 MHz, at room temperature and the maximum squeezing depths, 0.86 dB at room temperature and 2.6 dB at low temperature, are demonstrated.