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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Resonant cavities based on Parity-Time-symmetric diffractive gratings.

Mykola Kulishov¹, Bernard Kress, Radan Slavík

¹HTA Photomask, 1605 Remuda Lane, San Jose, CA. 95112, USA. mykolak@htaphotomask.com

|April 24, 2013

Summary

This summary is machine-generated.

We introduce novel optical structures using Parity-Time (PT) symmetry for unidirectional Bragg gratings. These structures enable unique optical functionalities and inherently support a single lasing mode.

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Area of Science:

Photonics and Optics
Quantum Physics
Materials Science

Background:

Traditional Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) structures rely on refractive index modulation.
Achieving unidirectional functionality in optical gratings is a significant challenge.
Parity-Time (PT) symmetry offers a new paradigm for designing optical devices.

Purpose of the Study:

To explore a new class of DFB and DBR structures utilizing Parity-Time (PT) symmetry.
To design and analyze novel unidirectional Bragg gratings with both phase and amplitude modulation.
To investigate the unique lasing properties of concatenated unidirectional gratings.

Main Methods:

Theoretical analysis using a transfer matrix approach.
Design of unidirectional Bragg gratings with periodic phase and amplitude variations.
Concatenation of two unidirectional Bragg gratings to form new DFB/DBR structures.

Main Results:

Demonstration of unidirectional Bragg gratings that are transparent from one side and reflective from the other.
Proposed novel DFB and DBR structures exhibiting unique transmission and reflection characteristics.
Identification of a key characteristic: inherent single lasing mode support.

Conclusions:

The proposed PT-symmetric DFB and DBR structures offer unprecedented unidirectional optical control.
These structures pave the way for advanced photonic devices with tailored functionalities.
The inherent single lasing mode property is crucial for applications requiring mode selectivity.