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arXiv · 1106.1758

Wide-band quantum interface for visible-to-telecommunication wavelength conversion

Rikizo Ikuta·Yoshiaki Kusaka·Tsuyoshi Kitano·Hiroshi Kato·Takashi Yamamoto·Masato Koashi·Nobuyuki Imoto
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Abstract

We perform the first demonstration of a quantum interface for frequency down-conversion from visible to telecommunication bands by using a nonlinear crystal. This interface has a potential to work over wide bandwidths, leading to a high-speed interface of frequency conversion. We achieve the conversion of a pico-second visible photon at 780 nm to a 1522-nm photon, and observe that the conversion process retain entanglement between the down-converted photon and another photon.

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Rikizo Ikuta, Yoshiaki Kusaka, Tsuyoshi Kitano, Hiroshi Kato, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto. 2011-06-09. Wide-band quantum interface for visible-to-telecommunication wavelength conversion. https://doi.org/10.1038/ncomms1544

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