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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Low-threshold lasing in active opal photonic crystals.

M Srinivas Reddy¹, R Vijaya, Ivan D Rukhlenko

¹IITB-Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai, India.

|April 3, 2013

Summary

This study explores low-threshold band-edge lasing in 3D photonic crystals (PhCs). Results show lower thresholds at low-frequency band edges, enabling tunable PhC chip lasers.

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Area of Science:

Photonics
Condensed Matter Physics
Optical Engineering

Background:

Photonic crystals (PhCs) offer unique light manipulation properties.
Band-edge lasing in PhCs is crucial for developing compact lasers.
Achieving low thresholds is key for practical applications.

Purpose of the Study:

To theoretically investigate low-threshold band-edge lasing in 3D face-centered cubic photonic crystals.
To analyze the influence of PhC structure and layer number on lasing properties.
To demonstrate tunable lasing frequencies for enhanced chip laser performance.

Main Methods:

Utilized a complex-valued permittivity approach.
Employed the Korringa-Kohn-Rostoker (KKR) method for theoretical analysis.
Investigated the first-order stop band and ΓL direction.

Main Results:

Identified lower lasing thresholds at the low-frequency band edge compared to the high-frequency band edge.
Analyzed the effect of the number of PhC layers on lasing frequency and threshold.
Demonstrated broad tunability of lasing frequency by altering the emission collection angle.

Conclusions:

The findings are beneficial for enhancing the performance of tunable, PhC-based chip lasers.
This research provides insights into optimizing PhC structures for efficient lasing.
The demonstrated tunability opens avenues for novel photonic device designs.