Deterministic control of all-optical analogue to electromagnetically induced transparency in coherently-coupled silicon photonic crystal cavities

TL;DR

This paper demonstrates the first deterministic tuning of an all-optical analogue to electromagnetically-induced transparency in coherently-coupled silicon photonic crystal cavities, enabling advanced control of light in integrated photonics.

Contribution

It introduces a novel experimental approach for deterministic control of EIT-like effects in coupled photonic crystal cavities, advancing solid-state optical coherence manipulation.

Findings

Transparency-resonance lifetimes exceed three times that of single cavities

Observation of Fano-type lineshapes and stepwise control of cavity interference

Analysis confirms potential for all-optical trapping and light storage

Abstract

Quantum coherence in atomic systems has led to fascinating outcomes, such as laser cooling and trapping, Bose-Einstein condensates, and electromagnetically-induced-transparency (EIT). In EIT, the sharp cancellation of medium absorption has led to phenomena such as lasing without inversion, freezing light, and dynamic storage of light in a solid-state system. Similar to atomic systems, EIT-like effects can be observed through classical and optical means. Here we report the first experimental deterministic tuning of all-optical analogue to EIT in coherently-coupled standing-wave photonic crystal cavities. Our observations include transparency-resonance lifetimes more than three times the single loaded cavity, Fano-type lineshapes, and stepwise control of the coherent cavity-cavity interference. Our system, with wavelength-scale localization and coupled to a single waveguide, is analyzed well through the coupled-mode formalism which examines the delay in both transparency- and Fano-like lineshapes. Our observations support applications towards all-optical trapping, stopping and time-reversal of light in a solid-state scalable implementation.