Beating the spectroscopic Rayleigh limit via post-processed heterodyne detection

• URL: http://arxiv.org/abs/2311.10574v2
• Date: Wed, 7 Feb 2024 14:32:26 GMT
• Title: Beating the spectroscopic Rayleigh limit via post-processed heterodyne detection
• Authors: Wiktor Krokosz, Mateusz Mazelanik, Micha{\l} Lipka, Marcin Jarzyna, Wojciech Wasilewski, Konrad Banaszek, Micha{\l} Parniak
• Abstract summary: We experimentally investigate this method in the time-frequency domain and demonstrate the spectroscopic superresolution for two distinct types of light sources. Results are backed by theoretical predictions based on estimation theory.
• Score: 1.055551340663609
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum-inspired superresolution methods surpass the Rayleigh limit in imaging, or the analogous Fourier limit in spectroscopy. This is achieved by carefully extracting the information carried in the emitted optical field by engineered measurements. An alternative to complex experimental setups is to use simple homodyne detection and customized data analysis. We experimentally investigate this method in the time-frequency domain and demonstrate the spectroscopic superresolution for two distinct types of light sources: thermal and phase-averaged coherent states. The experimental results are backed by theoretical predictions based on estimation theory.

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