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Related Experiment Video

Updated: Jan 12, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Multi-timescale frequency-phase matching for high-yield nonlinear photonics.

Mahmoud Jalali Mehrabad^1,2, Lida Xu^1,2, Gregory Moille^1,2

¹Joint Quantum Institute (JQI), University of Maryland, College Park, MD, USA.

Science (New York, N.Y.)

|November 6, 2025

Summary

This summary is machine-generated.

Nested frequency-phase matching enables wafer-scale integrated nonlinear photonics. This passive scheme achieves 100% device yield for harmonic generation, overcoming fabrication challenges in silicon nitride (SiN) devices.

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Area of Science:

Integrated nonlinear photonics
Nanophotonics
Materials science

Background:

Wafer-scale integrated nonlinear photonics faces challenges due to fabrication variations impacting strict frequency-phase matching.
Existing nonlinear optical processes require precise control, limiting device yield and scalability.

Purpose of the Study:

To introduce a passive scheme, nested frequency-phase matching, to relax constraints in nonlinear optical processes.
To demonstrate a scalable route for chip-scale nonlinear optics with high device yield.

Main Methods:

Implementation of nested frequency-phase matching in a silicon nitride (SiN) coupled ring resonator lattice.
Utilizing a two-timescale lattice design for passive harmonic generation.

Main Results:

Achieved 100% multifunctional wafer-scale device yield for harmonic generation.
Simultaneously generated ultrabroad bandwidth light across fundamental, second, third, and fourth harmonic bands.
Demonstrated passive operation without geometry fine-tuning.

Conclusions:

Nested frequency-phase matching successfully relaxes stringent phase-matching conditions, enabling high-yield wafer-scale fabrication.
This approach establishes a scalable pathway for chip-scale nonlinear optics.
Opens possibilities for integrated frequency conversion, metrology, and optical computing.