181.
| 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]
|
182.
| 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]
|
183.
| 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]
|
184.
| 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]
|
185.
| 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]
|
186.
| 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]
|
187.
| 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]
|
188.
| 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]
|
189.
| 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]
|
190.
| 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]
|
Channel
Address: Center for Quantum Devices; 2220 Campus Drive RM 4051; Evanston, IL 60208-0893
Phone: (847) 491-7251
Email: razeghi@northwestern.edu