Video Experimental Relacionado

Updated: Jan 8, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

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No reciprocidad óptica sin pérdidas mediante interferencia dual de Raman

Lifeng Liu, Yifan Zhan, Shicheng Zhang

|December 19, 2025

Abstract:

Atomic absorption-induced insertion loss poses a fundamental limitation on signal transmission in optical nonreciprocity (ONR) systems. We propose a lossless and magnetic-field-free ONR scheme based on dual-Raman interference in two far-detuned Λ-type three-level systems. In the forward direction, destructive interference cancels the imaginary part of the susceptibility while retaining a large phase shift, enabling absorption-free transmission. In contrast, Doppler shifts arising from atomic thermal motion disrupt the Raman resonances in the backward direction, suppressing both absorption and phase modulation. This direction-dependent optical response yields nonreciprocal phase shifts which, when implemented in a Mach-Zehnder interferometer, enable an optical isolator with 100% forward transmittance and an isolation of up to 37 dB.

Palabras clave:

No reciprocidad óptica Interferencia dual de Raman Aislamiento óptico Transmisión sin pérdidas Óptica cuántica Fotónica Física atómica

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