Nonreciprocity in Photon Pair Correlations of Classically Reciprocal Systems

Graf, Austin; Rogers, Steven D.; Staffa, Jeremy; Javid, Usman A.; Griffith, Dana H.; Lin, Qiang

doi:10.1103/physrevlett.128.213605

Cited by 21 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Traditionally, magneto-optical media are used to break the time-reversal symmetry with the Faraday rotation effect, which requires however bulky magnets making against real applications involving integrated photonic devices [5][6][7][8]. Hence, significant efforts have been made recently to develop the magnet-free optical non-reciprocity by exploring different mechanisms, including nonlinear effects [9][10][11][12][13][14][15][16][17], spatiotemporal modulations [18][19][20][21][22], optomechanical interactions [23][24][25][26][27][28], moving atomic lattices [29][30][31], chiral quantum systems [32][33][34][35][36], and atomic thermal motions [37][38][39][40][41][42][43][44][45][46]. Note also that nonreciprocal amplification has aroused particular interests and achieved significant progresses since it can facilitate the optical read-out of sensitive signals and simplify the construction of complex optical networks by avoiding the amplification of undesired reflections [46]<...…”

Section: Introductionmentioning

confidence: 99%

Broadband tunable transmission non-reciprocity in thermal atoms dominated by two-photon transitions

Zhao,

Zheng,

Zhang

et al. 2024

New J. Phys.

View full text Add to dashboard Cite

We propose a scheme for realizing broadband and tunable transmission non-reciprocity by utilizing two-photon near-resonant transitions in thermal atoms as single-photon far-detuned transitions can be eliminated. Our basic idea is to largely reduce the Doppler broadenings on a pair of two-photon, probe and coupling, transitions and meanwhile make the only four-photon transition Doppler-free (velocity-dependent) for a forward (backward) probe field. One main advantage of this scheme lies in that the transmission non-reciprocity can be realized and manipulated in a frequency range typically exceeding $200$ MHz with isolation ratio above $20$ dB and insertion loss below $1.0$ dB by modulating an assistant field in frequency and amplitude. The intersecting angle between four applied fields also serves as an effective control knob to optimize the nonreciprocal transmission of a forward or backward probe field, e.g. in a much wider frequency range approaching $1.4$ GHz.

show abstract