On-chip temporal telescope via moving index fronts

We propose a scheme for an on-chip signal pulse compression using a temporal telescope formed by a pump-induced moving refractive index front. To the best of our knowledge, this is the first numerical demonstration of such a concept using moving index perturbations. We numerically study the signal dynamics under the influence of a moving refractive index front in optical waveguides, revealing analogies to relativistic event horizon physics. Our simulations show that a free-carrier-induced refractive index front, which lowers the refractive index and induces a blue shift in the waveguide's band diagram, can overtake and trap a signal pulse, dynamically accelerating it to the front's velocity. As the interaction continues, the signal is eventually released from the front and transitions into a new velocity regime. This process of trapping, acceleration, and release mirrors the behavior of light near gravitational horizons, with the release phase analogous to light escaping a white hole. These results pave the way for new approaches in nonlinear optics and signal processing using compact, chip-scale systems.

Subjects

Non-linear signal manipulation

on-chip dynamic pulse compression

optical analogue of event horizon

DDC Class

621.3: Electrical Engineering, Electronic Engineering

530: Physics

518: Numerical Analysis

Lizenz

https://creativecommons.org/licenses/by/4.0/

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publishedVersion

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On-Chip_Temporal_Telescope_via_Moving_Index_Fronts.pdf

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Main Article

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977.73 KB

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On-chip temporal telescope via moving index fronts