Nonlinear quantum spectroscopy with parity-time-symmetric integrated circuits

Kumar P, Saravi S, Pertsch T, Setzpfandt F, Sukhorukov AA (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Photonics Research Optical Society of America

Book Volume: 10

Pages Range: 1763-1776

Journal Issue: 7

DOI: 10.1364/PRJ.450410

Abstract

We propose a novel quantum nonlinear interferometer design that incorporates a passive parity-time (PT)symmetric coupler sandwiched between two nonlinear sections where signal-idler photon pairs are generated. The PT symmetry enables efficient coupling of the longer-wavelength idler photons and facilitates the sensing of losses in the second waveguide exposed to analyte under investigation, whose absorption can be inferred by measuring only the signal intensity at a shorter wavelength where efficient detectors are readily available. Remarkably, we identify a new phenomenon of sharp signal intensity fringe shift at critical idler loss values, which is distinct from the previously studied PT symmetry breaking. We discuss how such unconventional properties arising from quantum interference can provide a route to enhancing the sensing of analytes and facilitate broadband spectroscopy applications in integrated photonic platforms.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Australian National University (ANU) AU Australia (AU)

How to cite

APA:

Kumar, P., Saravi, S., Pertsch, T., Setzpfandt, F., & Sukhorukov, A.A. (2022). Nonlinear quantum spectroscopy with parity-time-symmetric integrated circuits. Photonics Research, 10(7), 1763-1776. https://doi.org/10.1364/PRJ.450410

MLA:

Kumar, Pawan, et al. "Nonlinear quantum spectroscopy with parity-time-symmetric integrated circuits." Photonics Research 10.7 (2022): 1763-1776.

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