Phase matching between energy-time entanglement and two photon absorption processes

Holger F. Hofmann; Baihong Li

doi:10.1117/12.2593479

1 August 2021 Phase matching between energy-time entanglement and two photon absorption processes

Holger F. Hofmann, Baihong Li

Proceedings Volume 11835, Quantum Communications and Quantum Imaging XIX; 118350P (2021) https://doi.org/10.1117/12.2593479
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Energy-time entanglement can enhance two photon absorption by combining a precise two photon resonance with temporal correlations between the arrival times of the two photons. In general, the optimal timing of photon arrival is determined by the dynamics of the system between the initial and the final excitations. In this presentation, we show that the optimal timing of photon arrival corresponds to a specific phase dispersion in the frequency difference of the two photons. The absorption cross-section of energy-time entangled photons can be enhanced beyond the rate observed for optimal photon coincidence by adjusting the phase dispersion of one of the photons to match the optimal characteristics. We determine the maximal enhancement factor as a function of the bandwidth of the intermediate states and their detuning relative to the average photon frequency. Significant additional enhancements can be achieved when the bandwidth of the intermediate states is very narrow.

Conference Presentation

Citation Download Citation

Holger F. Hofmann and Baihong Li "Phase matching between energy-time entanglement and two photon absorption processes", Proc. SPIE 11835, Quantum Communications and Quantum Imaging XIX, 118350P (1 August 2021); https://doi.org/10.1117/12.2593479

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