201.
| French Connections: Manijeh Razeghi Thinks Globaly
McCormick - May 1, 2009
Part of Professor Razeghi's heart and soul will always be in France. Though she came to the United States more than 17 years ago, she got her start in Paris, and all of her family is still in France. She keeps up her French connections by collaborating with prestigious French universities -- and recruiting their best students. ... [read more]
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202.
| Northwestern Students Receive $10,000 Prizes from the Dow Sustainability Innovation Challenge
McCormick - March 23, 2009
The Northwestern Institute for Sustainable Practices will award CQD Graduate Student Can Bayram and two other student groups a $10,000 prize from the Dow Sustainability Innovation Challenge in recognition of research contributing to global sustainability. ... [read more]
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203.
| Modern Atomic Engineering: Inspirations from Nature
EECS Distinguished Speaker Series, Northwestern Univeristy - December 3, 2008
On December 3rd, 2008 Professor Razeghi gave a Distinguished lecture presentation titled "Modern Atomic Engineering: Inspirations from Nature" A video of this talk can be viewed at http://www.eecs.northwestern.edu/video/razeghi.html ... [read more]
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204.
| Light-Emitting Diodes: ZnO does away with green-LED problem
Laser Focus World - November 2, 2008
While blue and red LEDs can be made to shine brilliantly and have a long life, high-brightness green LEDs tend to die early. Now, scientists at Northwestern University (Evanston, IL) and Nanovation SARL (Orsay, France) have developed a type of green LED that has the potential to burn brightly while enduring year after year. Still in the early prototype stage, the hybrid-LED has a novel design that keeps the indium within its diode structure from diffusing over time and reducing the diode’s light output. ... [read more]
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205.
| Women in Optics Calender 2009
SPIE - November 1, 2008
What I find exciting
I appreciate the challenge of starting and developing a company, based on the fabrication of an emerging semiconductor (ZnO) that nobody would have bet on in 1999, and which has turned out to be one of the hottest topic in materials science ten years latter. ... [read more]
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206.
| Laser gunship hits $30 million bulls-eye
CNET News - October 17, 2008
Northwestern University engineering professor Manijeh Razeghi said there is a range of potential military uses for lasers. "Lasers can create fires. They can kill. Each laser wavelength has some application. Some of them you know about; some of them are classified, and we cannot speak about them." ... [read more]
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207.
| Airborne lasers to replace bombs? Boeing develops new ground-attack weapon
Medill Reports, Chicago - October 16, 2008
“Lasers can create fires, they can kill,†said Manijeh Razeghi, an engineering professor at Northwestern University, who has developed lasers for the military. “Each [laser] wavelength has some application. Some of them you know about, some of them are classified and we cannot speak about them.†... [read more]
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208.
| Powerful QCLs eye remote sensing
Compound Semiconductor - October 15, 2008
Our eyes tell us a great deal about our environment. However, they can’t spot the numerous invisible threats to our health and safety. What’s needed is a low-cost remote chemical sensor. Optical detection schemes are ideal for this task
because they can quickly cover vast areas with high-power lasers that are directed far from the detection system. The most promising source for remote mid-infrared sensing is the quantum cascade laser (QCL), currently being developed by researchers at the Center for Quantum Devices. ... [read more]
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209.
| Atomic Engineering of Quantum Systems in Group III-V Semiconductors for IR Detection and Imaging
Advanced Systems and Technology (AST) Directorate's Technology Seminar seris - October 7, 2008
Tuesday, 7 October 2008 Professor Razeghi gave a prestigious seminar in the J.D. Hill Conference Center Auditorium covering her Quantum Dot Infrared Photodetector and Focal Plane Array research. ... [read more]
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210.
| ZnO/GaN hybrid shows green LED promise
Compound Semiconductor .Net - September 3, 2008
Hybrid LED structures featuring GaN and ZnO layers could produce higher performance green
emitters than existing devices. Northwestern University and French startup Nanovation showed the concept's feasibility by making an LED with peak continuous-wave electroluminescent emission in the order of 2 mlm at 510 nm. These results were published in the in the August 25th issue of Applied Physics Letters. ... [read more]
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211.
| The Quantum Cascade Laser: A versatile and Powerful Tool
Optics and Photonics News - July 30, 2008
Many important applications in the infrared are awaiting the right laser source. Advances in Quantum Cascade Lasers will enable powerful new technologies to become realities. ... [read more]
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212.
| Nanostructured Sensors
SPIE Professional - July 1, 2008
Infrared photon imaging between 3 and 14 μm has important applications in security, defense, astronomy, and a number of other areas. Researchers at the CQD have overcome several challenges in integrating Type II superlattice materials into IR imaging systems. Their innovative work using Nanotechnology to create these structures has resulted in fabrication of the first high-quality IR
camera with a 10 μm cutoff wavelength. ... [read more]
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213.
| Type-II FPA on the Cover
IEEE Journal of Quantum Electronics, Vol. 44, No. 5&6 - June 1, 2008
The one of the CQD's most recent publications in the IEEE Journal of Quantum Electronics was chosen for the cover of the May-June issue. The cover photo consist of an image of Graduate Student Pierre-Yeves Delaunnay taken with an LWIR Type-2 FPA. ... [read more]
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214.
| New Superlattice Structure Enables High Performance Infrared Imaging
McCormick Press Release - May 27, 2008
Scientists at the Center for Quantum Devices (CQD) in the McCormick School of Engineering at Northwestern University have demonstrated for the first time a high-performance infrared imager, based on a Type II superlattice, which looks at wavelengths 20 times longer than visible light. ... [read more]
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215.
| New Mid-Infrared Lasers Show Doubled Efficiency
McCormick Press Release - May 19, 2008
Researchers at the Center for Quantum Devices at the McCormick School of Engineering at Northwestern University have recently doubled the efficiency of infrared lasers under the U.S. Defense Advanced Research Projects Agency’s Efficient Mid-wave Infrared Lasers (EMIL) program. ... [read more]
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216.
| Type-II semiconductor superlattice photodetectors new alternative to HgCdTe
Laser Focus World - May 15, 2008
In a invited talk at SPIE's Defense + Security Symposium March 17th, Professor Manijeh Razeghi announced that Type-II InAs/GaSb photodetectors may now be an important alternative to existing detectors in the LWIR and VLWIR ranges. ... [read more]
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217.
| Tiny Avalanche Photodiode Detects Single UV Photons
McCormick Press Release - January 28, 2008
In a significant breakthrough, researchers at Northwestern University’s Center for Quantum
Devices (CQD) have demonstrated visible-blind avalanche photodiodes (APDs) capable of
detecting single photons in the ultraviolet region (360-200 nm). ... [read more]
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218.
| Turning Ideas into Reality
SPIE - January 15, 2008
"Having a mentor to push and challenge you to do things you never imagined possible is worth more than any book." -- Manijeh Razeghi ... [read more]
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219.
| Award Winning Publication: Quantum-Dot IR Photodetectors Get 'Hotter'
Laser Focus World - December 31, 2007
Laser Focus World awarded the Center for Quantum Devices a prestigious Commendation for Excellence in Technical Communications in appreciation for the article Quantum-dot IR photodetectors get "hotter", published in December of 2007. ... [read more]
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220.
| Quantum-Dot IR Photodetectors Get 'Hotter'
Laser Focus World - December 15, 2007
Recent improvements to the operating temperature and quantum efficiency of quantum-dot infrared photo detectors (QDIPs) may lead to new high-performance imagers operating at or close to room temperature. They may be useful in medical and biological imaging, environmental and chemical monitoring, night vision, and infrared telescopes. ... [read more]
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221.
| Women in Optics Calender 2008
SPIE - December 1, 2007
What I wish someone had told me:
In all aspects of life, not only science, it is essential to surround yourself by those who have demonstrated excellence and those whom you can look to for inspiration Having a mentor to push and challenge you to do things you never imagined possible is worth more than any book. ... [read more]
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222.
| QC laser sets new wall-plug-efficiency record
Laser Focus World - September 1, 2007
Researchers at the CQD, who previously developed MWIR quantum-cascade lasers, are reporting another milestone in power output and wall-plug efficiency for their devices. The Northwestern team has demonstrated power levels of 675 mW at room temperature with a 9.3% wall-plug efficiency and power levels of more than 1 W at 150 K with a wall-plug efficiency greater than 18% at a wavelength of approximately 4.7 μm. ... [read more]
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223.
| Laser Sets Records in Power and Energy Efficiency
Northwestern University (Press Release) - July 18, 2007
The Center for Quantum Devices, has recently made great strides in laser design, material growth and laser fabrication that have greatly increased the output power and wall-plug efficiency of Quantum Cascade Lasers. The CQD has demonstrated lasers emitting at wavelengths of 4.5 microns, capable of producing over 700 milli-Watts of continuous output power at room temperature and more than one Watt of output power at lower temperatures. These lasers have a 10 percent wall-plug efficiency at room temperature and more than 18 percent wall-plug efficiency at lower temperatures, which is far superior to any competing laser technology at this wavelength. ... [read more]
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224.
| Hot developments in infrared photodetector technology
Nanotechnology in Paper & Packaging News - June 23, 2007
Researchers at Northwestern University, US, have made a significant advance in the development of infrared photodetectors that could lead to new imaging techniques for use in medicine, environmental monitoring, night vision and remote sensing from space. ... [read more]
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225.
| The Brighter Side of Semiconductors
Semiconductor International - June 1, 2007
The vast majority of activity in the semiconductor industry revolves around silicon. However, III-V semiconductors are not to be overlooked. “Compound semiconductors are like salt is to food,†said Professor Manijeh Razeghi, director of the CQD at Northwestern University. Each play an important role, contributing something the other cannot. ... [read more]
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Address: Center for Quantum Devices; 2220 Campus Drive RM 4051; Evanston, IL 60208-0893
Phone: (847) 491-7251
Email: razeghi@northwestern.edu