Thermo-optically induced transparency on a photonic chip

Marco Clementi*, Simone Iadanza, Sebastian A. Schulz, Giulia Urbinati, Dario Gerace, Liam O’Faloain, Matteo Galli*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Controlling the optical response of a medium through suitably tuned coherent electromagnetic fields is highly relevant in a number of potential applications, from all-optical modulators to optical storage devices. In particular, electromagnetically induced transparency (EIT) is an established phenomenon in which destructive quantum interference creates a transparency window over a narrow spectral range around an absorption line, which, in turn, allows to slow and ultimately stop light due to the anomalous refractive index dispersion. Here we report on the observation of a new form of both induced transparency and amplification of a weak probe beam in a strongly driven silicon photonic crystal resonator at room temperature. The effect is based on the oscillating temperature field induced in a nonlinear optical cavity, and it reproduces many of the key features of EIT while being independent of either atomic or mechanical resonances. Such thermo-optically induced transparency will allow a versatile implementation of EIT-analogs in an integrated photonic platform, at almost arbitrary wavelength of interest, room temperature and in a practical, low cost, and scalable system.
Original languageEnglish
Article number240
Number of pages10
JournalLight: Science & Applications
Publication statusPublished - 3 Dec 2021


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