Over the last 20 years, silicon photonics has revolutionized the field of integrated optics,
providing a novel and powerful platform to build mass-producible optical circuits. One of the …

Silicon photonics has drawn increasing attention in the past few decades and is a promising
key technology for future daily applications due to its various merits including ultra-low cost …

We present a simple and practical strategy that allows to design high-efficiency grating
couplers. The technique is based on the simultaneous apodization of two structural …

Efficient light energy transfer between optical waveguides has been a critical issue in
various areas of photonics and optoelectronics. Especially, the light coupling between …

Efficient coupling between integrated optical waveguides and optical fibers is essential to
the success of silicon photonics. While many solutions exist, perfectly vertical grating …

We present a gradient-based algorithm to design general 1D grating couplers without any
human input from start to finish, including a choice of initial condition. We show that we can …

We present the design and experimentally demonstrate a dual-level grating coupler with
subdecibel efficiency for a 220 nm thick silicon photonics waveguide which was fabricated …

We propose and numerically demonstrate a versatile strategy that allows designing highly
efficient dual-level grating couplers in different silicon nitride-based photonic platforms. The …

We present a gradient-based optimization strategy to design broadband grating couplers.
Using this method, we are able to reach, and often surpass, a user-specified target …

Surface grating couplers are fundamental components in chip-based photonic devices to
couple light between photonic integrated circuits and optical fibers. In this work, we report on …