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公开(公告)号：US09677741B2
公开(公告)日：2017-06-13
申请号：US15090348
申请日：2016-04-04
Applicant: Massachusetts Institute of Technology
Inventor： Chia Wei Hsu , Wenjun Qiu , Bo Zhen , Ofer Shapira , Marin Soljacic
CPC classification number: G02B27/0172 , B82Y20/00 , F21V9/08 , F21V9/12 , G02B5/0242 , G02B5/0278 , G02B2027/0112 , G02B2027/0145 , G02B2027/0147 , G02F1/0126 , G02F1/19 , G03B21/62 , G09F13/00 , Y10S977/773
Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light. Exemplary transparent scattering displays can be simple, inexpensive, scalable to large sizes, viewable over wide angular ranges, energy efficient, and transparent simultaneously.
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公开(公告)号：US20140230884A1
公开(公告)日：2014-08-21
申请号：US13768725
申请日：2013-02-15
Applicant: Massachusetts Institute of Technology
Inventor： Ofer Shapira , Marin Soljacic , Bo Zhen , Song-Liang Chua , Jeongwon Lee , John Joannopoulos
IPC: H01S3/30 , H01L31/055 , G01J3/443
CPC classification number: H01L31/055 , B82Y20/00 , G01N21/648 , G01N21/658 , G02B6/1225 , H01L31/054 , H01L31/0547 , H01S3/022 , H01S3/094034 , H01S3/168 , Y02E10/52 , Y10S977/759 , Y10S977/774
Abstract: Disclosed herein is a system for stimulating an emission from at least one 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.
Abstract translation: 本文公开了一种用于在包括图案化电介质基底的光子晶体的表面上刺激来自至少一个发射体（例如量子点或有机分子）的发射的系统。 该系统的实施例包括从第一角度照射发射体和光子晶体的激光器或其他源，其特征在于呈现出Fano共振的能带结构，以便以第二角度刺激发射器的发射。 光子晶体和发射极之间的耦合可以通过激发和提取增强而导致发射的光谱和角增强。 这些增强机制还会降低发射器的激光阈值。 例如，这些增强机制使得能够以降低的阈值强度激发100nm厚的稀释的有机分子溶液层。 激光阈值的这种降低使得更有效的有机发光器件和更敏感的分子感测。
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公开(公告)号：US20190339522A1
公开(公告)日：2019-11-07
申请号：US15935132
申请日：2018-03-26
Applicant: Massachusetts Institute of Technology
Inventor： Chia Wei Hsu , Wenjun Qiu , Bo Zhen , Ofer Shapira , Marin Soljacic
Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light. Exemplary transparent scattering displays can be simple, inexpensive, scalable to large sizes, viewable over wide angular ranges, energy efficient, and transparent simultaneously.
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公开(公告)号：US08969831B2
公开(公告)日：2015-03-03
申请号：US13768725
申请日：2013-02-15
Applicant: Massachusetts Institute of Technology
Inventor： Ofer Shapira , Marin Soljacic , Bo Zhen , Song-Liang Chua , Jeongwon Lee , John Joannopoulos
IPC: G01N21/64 , H01L31/055 , H01S3/16 , G02B6/122 , G01N21/65 , H01L31/054 , B82Y20/00 , H01S3/094 , H01S3/02
CPC classification number: H01L31/055 , B82Y20/00 , G01N21/648 , G01N21/658 , G02B6/1225 , H01L31/054 , H01L31/0547 , H01S3/022 , H01S3/094034 , H01S3/168 , Y02E10/52 , Y10S977/759 , Y10S977/774
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.
Abstract translation: 本文公开了一种用于在包括图案化电介质基底的光子晶体的表面上刺激来自至少一个发射体（例如量子点或有机分子）的发射的系统。 该系统的实施例包括从第一角度照射发射体和光子晶体的激光器或其他源，其特征在于呈现出Fano共振的能带结构，以便以第二角度刺激发射器的发射。 光子晶体和发射极之间的耦合可以通过激发和提取增强而导致发射的光谱和角增强。 这些增强机制还会降低发射器的激光阈值。 例如，这些增强机制使得能够以降低的阈值强度激发100nm厚的稀释的有机分子溶液层。 激光阈值的这种降低使得更有效的有机发光器件和更敏感的分子感测。
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