Quantitative Researcher at Citadel Investment Group
Location:
Greater Chicago Area
Industry:
Financial Services
Work:
Citadel Investment Group - Greater Chicago Area since Oct 2012
Quantitative Researcher
MIT Research Laboratory of Electronics - Greater Boston Area Jun 2008 - Sep 2012
Research Assistant
Morgan Stanley Strats & Modeling - Greater New York City Area Jun 2011 - Aug 2011
Summer Associate
Education:
Massachusetts Institute of Technology 2007 - 2012
PhD, Physics
Peking University 2003 - 2007
BS, Physics
Skills:
Quantitative Finance
Us Patents
Methods And Apparatus For Transparent Display Using Scattering Nanoparticles
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.
Methods And Apparatus For Transparent Display Using Scattering Nanoparticles
Chia Wei Hsu - Cambridge MA, US Wenjun Qiu - Chicago IL, US Bo Zhen - Cambridge MA, US Ofer Shapira - Cambridge MA, US Marin Soljacic - Belmont MA, US
International Classification:
G02B 27/01 G02B 5/02
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.
Methods And Apparatus For Transparent Display Using Scattering Nanoparticles
Chia Wei Hsu - Cambridge MA, US Wenjun Qiu - Chicago IL, US Bo Zhen - Cambridge MA, US Ofer Shapira - Cambridge MA, US Marin Soljacic - Belmont MA, US
International Classification:
G03B 21/62 G02B 5/02
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.
Methods And Apparatus For Transparent Display Using Scattering Nanoparticles
CHIA WEI HSU - CAMBRIDGE MA, US WENJUN QIU - CAMBRIDGE MA, US BO ZHEN - CAMBRIDGE MA, US OFER SHAPIRA - CAMBRIDGE MA, US MARIN SOLJACIC - BELMONT MA, US
Assignee:
MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA
International Classification:
F21V 33/00 F21V 5/00
US Classification:
362231, 362235, 427164, 977773
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.
Methods And Apparatus For Transparent Display Using Up-Converting Nanoparticles
CHIA WEI HSU - Cambridge MA, US WENJUN QIU - Cambridge MA, US BO ZHEN - Cambridge MA, US OFER SHAPIRA - Cambridge MA, US MARIN SOLJACIC - Belmont MA, US
International Classification:
F21V 33/00 F21V 9/12 F21V 9/08
US Classification:
362231, 362260, 427595, 977773
Abstract:
Disclosed herein are transparent color displays with nanoparticles made with nonlinear materials and/or designed to exhibit optical resonances. These nanoparticles are embedded in or hosted on a transparent substrate, such as a flexible piece of clear plastic or acrylic. Illuminating the nanoparticles with invisible light (e.g., infrared or ultraviolet light) causes them to emit visible light. For example, a rare-earth doped nanoparticle may emit visible light when illuminated simultaneoulsy with a first infrared beam at a first wavelength λand a second infrared beam at a second wavelength λ. And a frequency-doubling nanoparticle may emit visible light when illuminated with a single infrared beam at the nanoparticle's resonant frequency. Selectively addressing these nanoparticles with appropiately selected pump beams yields visible light emitted from the nanoparticles hosted by the transparent substrate in a desired pattern.
The work, which also included MIT graduate student Bo Zhen, recent PhD recipient Wenjun Qiu, MIT affiliate Ofer Shapira, and Brendan Lacey of the U.S. Army Edgewood Chemical Biological Center, was supported by the Army Research Office and the National Science Foundation.
Date: Jan 21, 2014
Category: Sci/Tech
Source: Google
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