Author: alekhya

We present optical switch and photonic logic gates utilizing phase changes of optical fields arising from Kerr interactions.
Laser & Photonics Review, e01500 (2025).

Our paper on ultralow loss silicon nitride integrated photonics using room-temperature reactive sputtering has ranked within the top 10% of most-viewed papers published by Laser & Photonics Review in 2023. Laser & Photonics Review, 2300642 (2023) – arXiv:2301.10758.

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Shuangyou is awarded a DFG grant on Low-Temperature Sputtered Silicon Nitride for Integrated Photonic Applications, together with Pascal. The project will fund a PhD position for 3 years, offering an outstanding opportunity to contribute to cutting-edge research at MPL.

We report a novel approach for on-chip optical switches based on the first experimental demonstration of spontaneous symmetry breaking in high-Q Si3N4 resonators. This can be used for the implementation of on-chip optical memories and optical gyroscopes.
Photonics Research 13, 360 (Editor’s pick!)

We investigate broadband dispersion engineering in microresonators by incorporating nanostructures along the sidewalls of ring resonators. This can be used for broadband frequency comb generation.
Photonics Research 13, 367

Our new paper about linear and nonlinear coupling of light in twin-resonator systems with Kerr-nonlinearities has been published. This can lead to real-time dispersion engineering, and active light distribution in telecom systems.
Photonics Research 12, 2733

Our group will be at Optica Advanced Photonics Congress in Québec, Canada from July 28th to August 1st and present our research projects in 9 talks.
Link to conference program

Our new PNAS paper presents the observation of controlled standing wave patterns that can be used for precise distance measurements with nm-accuracy. PNAS 121 (10) e2313981121, arxiv.

Our paper on ultralow loss silicon nitride integrated photonics using room-temperature reactive sputtering was published in Laser & Photonics Reviews. Our study demonstrates the lowest propagation losses achieved with a low temperature deposition method. It is CMOS compatible and can be used for hybrid integration with other photonic and electronic processes. Laser & Photonics Review, 2300642 (2023).

Our new paper titled “Geometry optimization for dark soliton combs in thin multimode silicon nitride microresonators” was published in Optics Express, which provides insights into engineering a Si₃N₄ structure for optimal effective nonlinearity with a compact footprint. We experimentally demonstrate the low-noise dark pulses with a repetition rate of 25 GHz in a Si₃N₄ resonator. Read more: Optics Express 31, 41420-41427 (2023).

Our paper on quintic soliton paper has been selected as the cover article in laser & photonics review. Our study demonstrates the first observation of solitons induced by fifth-order dispersion. Read more: Laser Photonics Rev., 2300075 (2023).

Our new paper on four-field symmetry breakings in photonic dimers has been published in Physical Review Research. This work demonstrates multi-level symmetry breakings, switching and chaos. Read more: Phys. Rev. Res. 5,L042012 (2023).

Our new paper on quintic-dispersion microresonator solitons has been published in Laser & Photonics Review. Our study demonstrates the first observation of solitons induced by fifth-order dispersion. Read more: Laser Photonics Rev., 2300075 (2023).

Congratulations to Arghadeep Pal for winning the best poster award at the spring school-2023 organised by the Max Planck School of Photonics (MPSP). The poster describes Machine Learning assisted prediction of microresonator structure for desired dispersion profiles. Read more: Opt. Express 31, 8020-8028 (2023).

We have used machine learning algorithms to predict structures of microresonators from dispersion profiles. This work lays the foundation of application of machine learning in inverse design of microring resonators.
https://doi.org/10.1364/OE.479899 – arXiv