226.
| 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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227.
| 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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228.
| 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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229.
| 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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230.
| 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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231.
| 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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232.
| 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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233.
| Making Strides in Quantum Dot Infrared Photodetectors
McCormick - May 17, 2007
Researchers at Northwestern University have made significant strides in the development of quantum dot infrared photodetectors -- technology that may provide new imaging techniques with applications in medical and biological imaging, environmental and chemical monitoring, night vision and infrared imaging from space. ... [read more]
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234.
| The Consummate Collaborator
McCormick - May 1, 2007
It's immediately clear when visiting the Center for Quantum Devices (CQD) that Manijeh Razeghi genuinely cares about each member of her lab. As they all file into her office for an interview, her enthusiasm is undeniable as she introduces each person. Part professor, part doting parent, Razeghi beams as she described the work of her "geniuses."
... [read more]
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235.
| Diode Laser Could Be Vital for Safeguarding Aircraft
Northwestern University Press Release - August 31, 2006
The Center for Quantum Devices at Northwestern University has recently made great strides in laser design, material growth, and laser fabrication that have greatly increased the output power and efficiency of QCLs. ... [read more]
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236.
| Continuous-Wave, Room Temperature Quantum Cascade Lasers.
Optics & Photonics News - May 1, 2006
Quantum cascade lasers are now capable of continuous-wave, room-temperature, single-frequency operation with large powers. This progress may be translated into a number of applications including medical breath analysis and environmental monitoring. ... [read more]
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237.
| Bioterror Defense
Northwestern - April 1, 2006
Led by venter director Manijhe Razeghi, researchers have created and demonstrated a microscale ultraviolet light detector, a new and more precise method of detection biological agents such as anthrax and smallpox. ... [read more]
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238.
| Electrical Engineering at Northwestern
Northwestern University EECS Department - January 11, 2006
The Electrical Engineering graduate program at Northwestern focuses on the research and application of electronic and photonic technologies. The EE curriculum includes a wide range of sources in solid-state electronics, lasers, photonics, quantum mechanics and more. ... [read more]
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239.
| Tiny Avalanche Photodiodes Target Bioterrorism Agents
Northwestern University Press Release - October 11, 2005
In a significant finding, researchers at Northwestern University's Center for Quantum Devices have demonstrated solar-blind avalanche photodiodes (APDs) that hold promise for universal biological agent detection. ... [read more]
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240.
| Blind Spot reveals Biological Agents
Spectrscopy Now - October 1, 2005
Manijeh Razeghi of Northwestern University's Center for Quantum Devices and her colleagues have demonstrated a 280 nm APD based on the semiconductor aluminum gallium nitride (AlGaN) with a photocurrent gain of more than 700. ... [read more]
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241.
| Light Sensor May Improve Battlefield Tools
Science News - October 1, 2005
Now, engineers have created a microscale ultraviolet light detector that's sturdier and consumes far less power, compared with photomultiplier tubes. Field instruments using this detector and others tuned to other wavelengths could shrink the size of bio-agent detection equipment. ... [read more]
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242.
| Room-Temperature 9.5 μm Quantum Cascade Laser Produces more than 100 mW
Photonics Spectra - October 1, 2005
As part of the Laser Photo-Acoustic Spectroscopy (LPAS) program funded by DARPA, researchers at Northwestern University have demonstrated quantum cascade lasers that produce 106 mW of CW 9.5 μm radiation at 298 K. ... [read more]
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243.
| Nothwestern Develops Biological Agent Detectors
All Headline News - September 14, 2005
Northwestern University's Center for Quantum Devices has developed solar-blind avalanche photodiodes that they hope to use as biological agent detectors. The researchers say the sensitive detectors can combine with ultraviolet LEDs already developed by Northwestern to create an inexpensive bio-agent detection system. ... [read more]
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244.
| New Biological Agent Detectors Developed
Northwestern University Press Release - September 14, 2005
Northwestern University's Center for Quantum Devices says it's developed solar-blind avalanche photodiodes that hold promise as biological agent detectors. ... [read more]
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245.
| Technology Holds Promise for Infrared Camera
Northwestern University Press Release - August 30, 2005
New technology developed at Northwestern University has the potential for broad application in the detection of terrorist activities such as missile attacks on U.S. troops. Scientist at the Center for Quantum Devices have demonstrated, for the first time, uncooled IR imaging using type-II superlattice technology. ... [read more]
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246.
| Chemical Warfare Agent Detection Systems Development Update
CompoundSemi News - August 11, 2005
Northwestern University researchers hve created a quantum cascade laser that may one day be a part of a man portable system to detect chemical warfare agents. This effort is part of a three-year program called Laser Photo-Acoustic Spectroscopy (LPAS), funded by the Defense Advanced Research Project Agency (DARPA). ... [read more]
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247.
| Laser May be Used as Defense Weapon
The Washington Times & Science Daily - August 5, 2005
Researchers at Northwestern University's Center for Quantum Devices have demonstrated a laser that hold promise as a defense weapon. They are the first to create a quantum cascade laser, or QCL, which can operate continuously at high-power and a room-temperature. ... [read more]
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248.
| Tiny Laser Mey be Weapon Against Terror
Northwestern University Press Release - August 5, 2005
In a significant breakthrough, researchers at Northwestern University's Center for Quantum Devices have demonstrated a specialized diode laser that hold promise as a weapon of defense in both civilian and military applications. ... [read more]
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249.
| InAs/GaSb Superlattice Photodiode Offers Uncooled Mid-IR Operation
Photonics Spectra - August 1, 2005
Scientist from Northwestern University have reported the development of mid-infrared photodiodes that are based on InAs/GaSb superlattices. The device which have a cutoff wavelength of 5 μm are designed to operate at room temperature or at 77K. ... [read more]
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250.
| 320 x 256 Detector Array is Solar-Blind
Laser Focus World - April 1, 2005
Researchers at Northwestern University have produced, entirely in their laboratory, the first AlGaN-based 320 x 256 UV FPA of high quality and have published several good images at a 280-nm wavelength. ... [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