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Title: Photonic crystal surface-emitting lasers enabled by an accidental Dirac point

Abstract

A photonic-crystal surface-emitting laser (PCSEL) includes a gain medium electromagnetically coupled to a photonic crystal whose energy band structure exhibits a Dirac cone of linear dispersion at the center of the photonic crystal's Brillouin zone. This Dirac cone's vertex is called a Dirac point; because it is at the Brillouin zone center, it is called an accidental Dirac point. Tuning the photonic crystal's band structure (e.g., by changing the photonic crystal's dimensions or refractive index) to exhibit an accidental Dirac point increases the photonic crystal's mode spacing by orders of magnitudes and reduces or eliminates the photonic crystal's distributed in-plane feedback. Thus, the photonic crystal can act as a resonator that supports single-mode output from the PCSEL over a larger area than is possible with conventional PCSELs, which have quadratic band edge dispersion. Because output power generally scales with output area, this increase in output area results in higher possible output powers.

Inventors:
; ;
Issue Date:
Research Org.:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1164669
Patent Number(s):
8,902,946
Application Number:
13/771,935
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
DOE Contract Number:  
SC0001299
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Feb 20
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chua, Song Liang, Lu, Ling, and Soljacic, Marin. Photonic crystal surface-emitting lasers enabled by an accidental Dirac point. United States: N. p., 2014. Web.
Chua, Song Liang, Lu, Ling, & Soljacic, Marin. Photonic crystal surface-emitting lasers enabled by an accidental Dirac point. United States.
Chua, Song Liang, Lu, Ling, and Soljacic, Marin. Tue . "Photonic crystal surface-emitting lasers enabled by an accidental Dirac point". United States. https://www.osti.gov/servlets/purl/1164669.
@article{osti_1164669,
title = {Photonic crystal surface-emitting lasers enabled by an accidental Dirac point},
author = {Chua, Song Liang and Lu, Ling and Soljacic, Marin},
abstractNote = {A photonic-crystal surface-emitting laser (PCSEL) includes a gain medium electromagnetically coupled to a photonic crystal whose energy band structure exhibits a Dirac cone of linear dispersion at the center of the photonic crystal's Brillouin zone. This Dirac cone's vertex is called a Dirac point; because it is at the Brillouin zone center, it is called an accidental Dirac point. Tuning the photonic crystal's band structure (e.g., by changing the photonic crystal's dimensions or refractive index) to exhibit an accidental Dirac point increases the photonic crystal's mode spacing by orders of magnitudes and reduces or eliminates the photonic crystal's distributed in-plane feedback. Thus, the photonic crystal can act as a resonator that supports single-mode output from the PCSEL over a larger area than is possible with conventional PCSELs, which have quadratic band edge dispersion. Because output power generally scales with output area, this increase in output area results in higher possible output powers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {12}
}

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