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Updated: Jun 27, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Published on: September 26, 2014

Photonic bandgap microcombs at 1064 nm.

Grisha Spektor^1,2,3, Jizhao Zang^1,2, Atasi Dan^1,2

¹Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

|April 29, 2024

Summary

This summary is machine-generated.

Researchers demonstrate dark soliton microcombs at 1064 nm using tantalum pentoxide microresonators. This photonic design enables spectral control for applications in quantum technologies and bioimaging.

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Last Updated: Jun 27, 2025

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Area of Science:

Photonics
Quantum Optics
Materials Science

Background:

Microresonator frequency combs (microcombs) are vital tools in diverse scientific fields.
Existing research primarily focuses on microcombs operating in the 1550 nm band.
Expanding microcomb operation to other spectral bands is crucial for new applications.

Purpose of the Study:

To demonstrate the formation and spectral control of normal-dispersion dark soliton microcombs at 1064 nm.
To explore the unique soliton pulse shapes and operating behaviors in these novel microcombs.
To investigate the role of photonic design in tailoring microcomb spectra.

Main Methods:

Utilizing tantalum pentoxide (Ta2O5) normal-dispersion microresonators.
Inducing a photonic bandgap using a photonic crystal to achieve a 200 GHz repetition rate.
Adjusting resonator dispersion via nanostructured geometry for spectral control.
Employing numerical modeling to understand soliton existence ranges.

Main Results:

Successful generation of dark soliton microcombs at 1064 nm.
Demonstrated control over the spectral bandwidth by modifying resonator dispersion.
Observed unique soliton pulse shapes and operating behaviors.
Established the operational range for these microcombs through numerical simulations.

Conclusions:

Photonic design is key to tailoring microcomb spectra across broad wavelength ranges.
Normal-dispersion dark soliton microcombs at 1064 nm offer significant potential for various applications.
This work paves the way for advancements in bioimaging, spectroscopy, and photonic-atomic quantum technologies.