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Title: Homodyne detection of a two-photon resonance assisted by cooperative emission
Authors: Madasu, Chetan Sriram
Kwong, Chang Chi
Wilkowski, David
Pandey, Kanhaiya
Keywords: Science::Physics
Issue Date: 2022
Source: Madasu, C. S., Kwong, C. C., Wilkowski, D. & Pandey, K. (2022). Homodyne detection of a two-photon resonance assisted by cooperative emission. Physical Review A, 105(1), 013713-1-013713-8.
Journal: Physical Review A
Abstract: Focusing on the transient regime, we explore atomic two-photon spectroscopy with self-aligned homodyne interferometry in a $\Lambda$-system with large optical depth. The two light sources at the origin of the interference are the single-photon transient transmission of the probe, and the slow light of the electromagnetically induced transparency. By switching off the probe laser abruptly (flash effect), the transient transmission signal is reinforced by cooperativity, showing enhanced sensitivity to the two-photon frequency detuning. If the probe laser is periodically switched on and off, the amplitude of the transmission signal varies and remains large even for high modulation frequency. This technique has potential applications in sensing, such as magnetometry and velocimetry, and in coherent population trapping clocks.
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.105.013713
Schools: School of Physical and Mathematical Sciences 
Research Centres: Quantum Hub
The Photonics Institute 
Centre for Disruptive Photonic Technologies (CDPT) 
MajuLab, International Research Laboratory IRL 3654, CNRS
Rights: © 2022 American Physical Society. All rights reserved. This paper was published in Physical Review A and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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