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APL Quantum

Tailoring optical pulse transport in a two-mode waveguide coupled with a quantum system

Adam Sulieman Ibrahim Abdalla

Published May 13, 2025• 0 citations
Publisher

Abstract

The dynamics of a coherent wave packet traveling through a two-mode waveguide, coupled to a cavity embedded with a two-state quantum system, is analyzed. The guided coherent wave transmission and reflection coefficients, as well as the atom and cavity excitation amplitudes, are solved exactly via a real-space approach. We show that a two-point waveguide coupled to a Rydberg-atom hybrid system can tailor the waveform of the incident coherent pulse wave into other forms by controlling the coupling strength tuning between the waveguide, the cavity, and the atom. Tailoring involves modifying properties such as amplitude, phase, or spectral content based on the quantum system interaction. This phenomenon is different from the situation of the plane wave input, where the transmitted and reflected waves are the plane waves and the same to the incident one. Consequently, we provide an effective method that can be used to tailor pulse-wave propagation to enhance efficient quantum sensitivity in the field of ultrafast photonics devices.

DOI
10.1063/5.0255588

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Based on the symmetric, asymmetric atom–photon couplings and the phase difference between two separated atoms, single-photon transport properties in an optical waveguide coupled with two separated two-level atoms are theoretically investigated. The transmission and reflection amplitudes for the single-photon propagation in such a hybrid system are deduced via a real-space approach. Several new phenomena such as phase-coupled induced transparency, single-photon switches, symmetric and asymmetric bifrequency photon attenuators are analyzed. In addition, the dissipation effect of such a hybrid system is also discussed.
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