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Related Experiment Video

Updated: May 13, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum light generation on a silicon chip using waveguides and resonators.

Jun Rong Ong¹, Shayan Mookherjea

¹Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093-0407, USA. j5ong@ucsd.edu

|March 14, 2013

Summary

Researchers developed a compact silicon device that generates over 1 billion photon pairs per second. This breakthrough in quantum light sources operates at room temperature with low optical power.

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Area of Science:

Quantum optics
Integrated photonics
Materials science

Background:

Traditional bulk crystal or fiber-based assemblies for quantum light sources are often bulky and less controllable.
There is a need for compact, efficient, and on-chip sources of quantum light, particularly for telecommunications wavelengths.

Purpose of the Study:

To propose and demonstrate a novel periodic waveguide design for enhanced quantum light generation.
To achieve high generation rates of photon pairs and heralded single photons from a chip-scale device.
To explore the potential of integrated optical devices for practical quantum technologies.

Main Methods:

Designing a periodic waveguide composed of a sequence of optical resonators.
Fabricating a sub-millimeter-long silicon device utilizing this periodic waveguide structure.
Characterizing the device's performance under low optical power (approx. 10 milliwatts) at room temperature.

Main Results:

The proposed periodic waveguide significantly outperforms conventional waveguides and single resonators in photon pair generation.
The device achieved generation rates exceeding 1 Giga-pairs per second.
The spectral properties of the generated quantum light were analyzed, revealing novel opportunities.

Conclusions:

Periodic waveguides offer a superior approach for on-chip quantum light sources compared to conventional designs.
The room-temperature silicon device demonstrates a highly efficient and compact source of quantum light.
This technology paves the way for scalable and practical chip-scale quantum light applications.