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Measurement principles for quantum spectroscopy of molecular materials with entangled photons. | LitMetric

AI Article Synopsis

  • * The research outlines strategies for enhancing spontaneous parametric downconversion, enabling the generation of biphoton states with suitable spectral bandwidth in the visible range.
  • * The study also introduces methods to design and measure the spectral correlations between photon pairs, suggesting that these techniques could be used as a new platform for investigating interactions in materials.

Article Abstract

Nonlinear spectroscopy with quantum entangled photons is an emerging field of research that holds the promise to achieve superior signal-to-noise ratio and effectively isolate many-body interactions. Photon sources used for this purpose, however, lack the frequency tunability and spectral bandwidth demanded by contemporary molecular materials. Here, we present design strategies for efficient spontaneous parametric downconversion to generate biphoton states with adequate spectral bandwidth and at visible wavelengths. Importantly, we demonstrate, by suitable design of the nonlinear optical interaction, the scope to engineer the degree of spectral correlations between the photons of the pair. We also present an experimental methodology to effectively characterize such spectral correlations. Importantly, we believe that such a characterization tool can be effectively adapted as a spectroscopy platform to optically probe system-bath interactions in materials.

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Source
http://dx.doi.org/10.1063/5.0156598DOI Listing

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