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Nonclassical correlations between terahertz-bandwidth photons mediated by rotational quanta in hydrogen molecules

OPTICS LETTERS (2015)

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OPTICS LETTERS
卷 40, 期 6, 页码 922-925

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OPTICAL SOC AMER
DOI: 10.1364/OL.40.000922

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Quantum photonics offers much promise for the development of new technologies. The ability to control the interaction of light and matter at the level of single quantum excitations is a prerequisite for the construction of potentially powerful devices. Here we use the rotational levels of a room temperature ensemble of hydrogen molecules to couple two distinct optical modes at the single photon level using femtosecond pulses with 2 THz bandwidth. We observe photon correlations that violate a Cauchy-Schwarz inequality, thereby verifying the creation of a nonclassical state. This work demonstrates the rich potential of molecules for use in ultrafast quantum photonic devices.

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