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Title: Excitation enhancement and extraction enhancement with photonic crystals

Disclosed herein is a system for stimulating emission from at least one an emitter, such as a quantum dot or organic molecule, on the surface of a photonic crystal comprising a patterned dielectric substrate. Embodiments of this system include a laser or other source that illuminates the emitter and the photonic crystal, which is characterized by an energy band structure exhibiting a Fano resonance, from a first angle so as to stimulate the emission from the emitter at a second angle. The coupling between the photonic crystal and the emitter may result in spectral and angular enhancement of the emission through excitation and extraction enhancement. These enhancement mechanisms also reduce the emitter's lasing threshold. For instance, these enhancement mechanisms enable lasing of a 100 nm thick layer of diluted organic molecules solution with reduced threshold intensity. This reduction in lasing threshold enables more efficient organic light emitting devices and more sensitive molecular sensing.
Inventors:
; ; ; ; ;
Issue Date:
OSTI Identifier:
1171649
Assignee:
Massachusetts Institute of Technology (Cambridge, MA) DOESC
Patent Number(s):
8,969,831
Application Number:
13/768,725
Contract Number:
SC0001299
Resource Relation:
Patent File Date: 2013 Feb 15
Research Org:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Other works cited in this record:

Enabling single-mode behavior over large areas with photonic Dirac cones
journal, June 2012
  • Bravo-Abad, J.; Joannopoulos, J. D.; Soljacic, M.
  • Proceedings of the National Academy of Sciences, Vol. 109, Issue 25, p. 9761-9765
  • DOI: 10.1073/pnas.1207335109

Observation and Differentiation of Unique High-Q Optical Resonances Near Zero Wave Vector in Macroscopic Photonic Crystal Slabs
journal, August 2012

Photonic-crystal slow-light enhancement of nonlinear phase sensitivity
journal, January 2002
  • Soljačić, Marin; Johnson, Steven G.; Fan, Shanhui
  • Journal of the Optical Society of America B, Vol. 19, Issue 9, p. 2052-2059
  • DOI: 10.1364/JOSAB.19.002052

Analysis of guided resonances in photonic crystal slabs
journal, June 2002

Dirac cones induced by accidental degeneracy in photonic crystals and zero-refractive-index materials
journal, May 2011
  • Huang, Xueqin; Lai, Yun; Hang, Zhi Hong
  • Nature Materials, Vol. 10, Issue 8, p. 582-586
  • DOI: 10.1038/nmat3030

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