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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Enhanced angular tolerance of resonant waveguide grating reflectors.

Stefanie Kroker¹, Frank Brückner, Ernst-Bernhard Kley

¹Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Jena, Germany. stefanie.kroker@uni‑jena.de

|February 18, 2011

Summary

We developed a novel method using stacked resonant structures to improve angular tolerance in waveguide gratings. This technique achieves near-perfect reflectivity across all angles, enabling advanced optical components.

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Published on: July 18, 2015

Area of Science:

Optics and Photonics
Materials Science

Background:

Resonant waveguide gratings are crucial optical components.
Enhancing their angular tolerance is a key challenge for broader applications.

Purpose of the Study:

To introduce a new approach for enhancing the angular tolerance of resonant waveguide gratings.
To achieve near-unity reflectivity over the entire angular spectrum.

Main Methods:

Stacking two resonant structures to create a double grating configuration.
Utilizing silicon and diamond as high- and low-index materials, respectively.
Analyzing device functionality through element decomposition.

Main Results:

Demonstrated reflectivities close to unity across the entire angular spectrum with a double T-shaped grating.
Showcased the potential for monolithic silicon structures with similar performance.
Illustrated the device's functionality via separated element analysis.

Conclusions:

The proposed stacking approach significantly enhances angular tolerance in resonant waveguide gratings.
This method enables the development of novel diffractive-reflective optical components.
Potential applications include high-precision metrology with reduced thermal noise.