Frequency Pushing Enhanced by an Exceptional Point in an Atom-cavity Coupled System

Overview

Journal Sci Rep

Specialty Science

Date 2024 Feb 11

PMID 38342945

Authors

Joohye Lee

Jinuk Kim

Kyungwon An

Affiliations

Soon will be listed here.

Abstract

We observed the frequency pushing of the cavity resonance as a result of the coupling of the cavity field with the ground state Ba in a high-Q cavity. A weak probe laser propagated along the axis of a Fabry-Pérot cavity while ground-state barium atoms traversed the cavity mode perpendicularly. By operating the atom-cavity composite in the vicinity of an exceptional point, we could observe a greatly enhanced frequency shift of the cavity transmission peak, which was pushed away from the atomic resonance, resulting in up to 41 ± 7 kHz frequency shift per atom from the empty cavity resonance. We analyzed our results by using the Maxwell-Schrödinger equation and obtained good agreement with the measurements.

References

De Martini F , Jacobovitz . Anomalous spontaneous-stimulated-decay phase transition and zero-threshold laser action in a microscopic cavity. Phys Rev Lett. 1988; 60(17):1711-1714. DOI: 10.1103/PhysRevLett.60.1711. View

Childs , An , Otteson , Dasari , FELD . Normal Mode Line Shapes for Atoms in Standing-Wave Optical Resonators. Phys Rev Lett. 1996; 77(14):2901-2904. DOI: 10.1103/PhysRevLett.77.2901. View

Wiersig J, Gies C, Jahnke F, Assmann M, Berstermann T, Bayer M . Direct observation of correlations between individual photon emission events of a microcavity laser. Nature. 2009; 460(7252):245-9. DOI: 10.1038/nature08126. View

Kim J, Yang D, Oh S, An K . Coherent single-atom superradiance. Science. 2017; 359(6376):662-666. DOI: 10.1126/science.aar2179. View

Takahashi H, Kassa E, Christoforou C, Keller M . Strong Coupling of a Single Ion to an Optical Cavity. Phys Rev Lett. 2020; 124(1):013602. DOI: 10.1103/PhysRevLett.124.013602. View

Thompson , Rempe , Kimble . Observation of normal-mode splitting for an atom in an optical cavity. Phys Rev Lett. 1992; 68(8):1132-1135. DOI: 10.1103/PhysRevLett.68.1132. View

Dembowski C, Dietz B, Graf H, Harney H, Heine A, Heiss W . Observation of a chiral state in a microwave cavity. Phys Rev Lett. 2003; 90(3):034101. DOI: 10.1103/PhysRevLett.90.034101. View

An , Childs , Dasari , FELD . Microlaser: A laser with one atom in an optical resonator. Phys Rev Lett. 1994; 73(25):3375-3378. DOI: 10.1103/PhysRevLett.73.3375. View

Oppo , Politi , Lippi , Arecchi . Frequency pushing in lasers with injected signal. Phys Rev A Gen Phys. 1986; 34(5):4000-4007. DOI: 10.1103/physreva.34.4000. View

10.

Ann B, Song Y, Kim J, Yang D, An K . Observation of scalable sub-Poissonian-field lasing in a microlaser. Sci Rep. 2019; 9(1):17110. PMC: 6863906. DOI: 10.1038/s41598-019-53525-3. View

11.

Kim J, Lee M, Kim D, Seo W, Hong H, Song Y . Prescribed nondegenerate high-order modes in an axial-asymmetric high-finesse Fabry-Perot microcavity. Opt Lett. 2012; 37(9):1457-9. DOI: 10.1364/OL.37.001457. View

12.

Choi Y, Kang S, Lim S, Kim W, Kim J, Lee J . Quasieigenstate coalescence in an atom-cavity quantum composite. Phys Rev Lett. 2010; 104(15):153601. DOI: 10.1103/PhysRevLett.104.153601. View

13.

Hong H, Seo W, Song Y, Lee M, Jeong H, Shin Y . Spectrum of the cavity-QED microlaser: strong coupling effects in the frequency pulling at off resonance. Phys Rev Lett. 2013; 109(24):243601. DOI: 10.1103/PhysRevLett.109.243601. View

14.

Filipowicz , Javanainen , Meystre . Theory of a microscopic maser. Phys Rev A Gen Phys. 1986; 34(4):3077-3087. DOI: 10.1103/physreva.34.3077. View

15.

Specht H, Nolleke C, Reiserer A, Uphoff M, Figueroa E, Ritter S . A single-atom quantum memory. Nature. 2011; 473(7346):190-3. DOI: 10.1038/nature09997. View

16.

Lee S, Yang J, Moon S, Lee S, Shim J, Kim S . Observation of an exceptional point in a chaotic optical microcavity. Phys Rev Lett. 2009; 103(13):134101. DOI: 10.1103/PhysRevLett.103.134101. View

17.

Rempe , WALTHER . Observation of sub-Poissonian photon statistics in a micromaser. Phys Rev Lett. 1990; 64(23):2783-2786. DOI: 10.1103/PhysRevLett.64.2783. View

18.

Choi W, Lee J, An K, Fang-Yen C, Dasari R, Feld M . Observation of sub-poisson photon statistics in the cavity-QED microlaser. Phys Rev Lett. 2006; 96(9):093603. DOI: 10.1103/PhysRevLett.96.093603. View

19.

Kim J, Kim J, Seo J, Park K, Moon S, An K . Practical lineshape of a laser operating near an exceptional point. Sci Rep. 2021; 11(1):6164. PMC: 7969747. DOI: 10.1038/s41598-021-85665-w. View

20.

Khajavikhan M, Simic A, Katz M, Lee J, Slutsky B, Mizrahi A . Thresholdless nanoscale coaxial lasers. Nature. 2012; 482(7384):204-7. DOI: 10.1038/nature10840. View