Phase-Coherent Manipulation of Cold Biexcitonic Waves(Condensed Matter : Electronic Structure, Electrical, Mgagnetic and Optical Properties)

概要

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By using femtosecond optical pulses we create and manipulate a long-lived highly coherent biexcitonic wave in CuCl. Phase space compression by a factor 10^2 in the two-photon absorption process yields a quasiparticle ensemble with a density of up to 10^<13> cm^<-3> more than 10^4 per mode, which shows harmonic scalar wave behavior for 70ps. The coherent biexciton ensemble acts as a phase-dependent two-photon amplifier for optical pulses. Phase sensitivity of the light pulse transmission allows us to phase lock the two successive pulses and demonstrates the coherent control of biexciton waves. By measuring the visibility of the biexcitonic interference pattern we confirm a high degree of coherence of the stored excitation.
社団法人日本物理学会の論文
2002-05-15