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Title: Excitation enhancement and extraction enhancement with photonic crystals

Abstract

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:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1171649
Patent Number(s):
8969831
Application Number:
13/768,725
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
SC0001299
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Feb 15
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Shapira, Ofer, Soljacic, Marin, Zhen, Bo, Chua, Song-Liang, Lee, Jeongwon, and Joannopoulos, John. Excitation enhancement and extraction enhancement with photonic crystals. United States: N. p., 2015. Web.
Shapira, Ofer, Soljacic, Marin, Zhen, Bo, Chua, Song-Liang, Lee, Jeongwon, & Joannopoulos, John. Excitation enhancement and extraction enhancement with photonic crystals. United States.
Shapira, Ofer, Soljacic, Marin, Zhen, Bo, Chua, Song-Liang, Lee, Jeongwon, and Joannopoulos, John. Tue . "Excitation enhancement and extraction enhancement with photonic crystals". United States. https://www.osti.gov/servlets/purl/1171649.
@article{osti_1171649,
title = {Excitation enhancement and extraction enhancement with photonic crystals},
author = {Shapira, Ofer and Soljacic, Marin and Zhen, Bo and Chua, Song-Liang and Lee, Jeongwon and Joannopoulos, John},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {3}
}

Patent:

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