Year: 2025
Type: article
Abstract: Integrated nonlinear photonics struggles to deliver wafer-scale functional device yields: Nanometer-level fabrication variations compromise the strict frequency-phase matching mandated by energy- and momentum-conserving nonlinear processes. We introduce nested frequency-phase matching, a passive scheme that relaxes these constraints, and implement it in a two-timescale lattice of commercially available silicon nitride (SiN) coupled ring resonators for harmonic generation. The nested lattice simultaneously generates ultrabroad bandwidth light in the fundamental-, second-, third-, and fourth-harmonic bands and achieves 100% multifunctional wafer-scale device yield, all passively and without geometry fine-tuning. Distinct spatial and spectral signatures confirm the predicted relaxation of frequency-phase matching, establishing a scalable route for chip-scale nonlinear optics. Our approach provides possibilities for integrated frequency conversion and synchronization, self-referencing, precision metrology, squeezed-light sources, and nonlinear optical computing.
Source: Science
Authors: Mahmoud Jalali Mehrabad, Lida Xu, Gregory Moille, Christopher J. Flower, Supratik Sarkar, Apurva Padhye, Shao-Chien Ou, Daniel G. Suárez-Forero, Mahdi Ghafariasl, Yanne Chembo, Kartik Srinivasan, Mohammad Hafezi
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415970777