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Efficient Two-Photon Light Amplification by a Coherent Biexciton Wave

Abstract : A reversible coupling between photon pair states and a long-lived, highly coherent biexciton wave in CuCl allows efficient phase-sensitive two-photon amplification or attenuation of ultrashort light pulses. We demonstrate a gain of 350  cm-1 for a pump intensity of 1  MW/cm2, nearly 2 orders of magnitude higher than that achievable with conventional parametric crystal amplifiers. We develop a theoretical model that describes this new type of parametric converter where the light pump is replaced by a coherent biexciton wave and show that it is well suited for the generation of entangled photons and the squeezing of an optical beam with ultrafast time gating.
keyword : excitons
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Submitted on : Sunday, March 14, 2010 - 2:23:44 PM
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Ryo Shimano, Yu Svirko, André Mysyrowicz, Makoto Kuwata-Gonokami. Efficient Two-Photon Light Amplification by a Coherent Biexciton Wave. Physical Review Letters, American Physical Society, 2002, 89 (23), pp.233601. ⟨10.1103/PhysRevLett.89.233601⟩. ⟨hal-00463679⟩



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