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121.
| Wenjia Zhou Wins 1st Place at 2016 CNST Nanotechnology Poster Session
Press Release - May 6, 2016
Wenjia Zhou, a graduate student working with Professor Razeghi at the CQD, won first place in the 2016 CNST Nanaotechnology Poster Fair held at the University of Illinois at Urbana-Champaign on May 6 for his project “Monolithically integrated tunable quantum cascade laser source for gas sensing.†... [read more]
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122.
| Keynote Lecture Award: CNST 14th Annual Nanotechnology Workshop
Press Release - May 6, 2016
Professor Manijeh Razeghi was given the Keynote Lecture Award for her talk at the CNST 14th Annual Nanotechnology Workshop held at the University of Illinois at Champaign-Urbana on May 6, 2016. ... [read more]
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123.
| Wenjia Zhou Wins 3rd Place at 2016 EECS Poster Session
EECS Press Release - April 19, 2016
Wenjia Zhou, a graduate student working with Professor Razeghi at the CQD, won third place in the 2016 EECS Poster Fair on April 19 for his project on “Monolithically integrated tunable quantum cascade laser source for gas sensing.†... [read more]
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124.
| Thomas Yang Wins 3rd Place at 2016 EECS Poster Session
EECS Press Release - April 19, 2016
Thomas Yang, an undergraduate student working with Professor Razeghi at the CQD, won third place in the 2016 EECS Poster Fair on April 19 for his project on “Material Growth and Characterization of III-V Materials for Long-Wavelength Infrared (LWIR) Detection using Quantum Disc-based Focal Plane Arrays.†... [read more]
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125.
| New Terahertz Source Could Strengthen Sensing Applications
McCormick Press Release - March 25, 2016
Current terahertz sources are large, multi-component systems that sometimes require complex vacuum systems, external pump lasers, and even cryogenic cooling. The unwieldy devices are heavy, expensive, and hard to transport, operate, and maintain.
Now Northwestern Engineering’s Manijeh Razeghi has developed a new type of security detection device that bypasses these issues. With the ability to detect explosives, chemical agents, and dangerous biological substances from safe distances, the device could make public spaces more secure than ever. ... [read more]
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126.
| Single-chip mid-IR quantum-cascade laser plus amplifier is widely tunable
Laser Focus World Press Release - January 7, 2016
Manijeh Razeghi and her colleagues at Northwestern University (Evanston, IL) have now integrated a mid-infrared (4.8 μm spectral region) electrically tuned quantum-cascade laser (QCL) with an on-chip amplifier, creating a compact package that can output more than 5 W in pulsed mode tunable over a 270 nm spectral range. A refined geometry emits 1.25 W continuous-wave (CW) with a 300 nm tuning range. Both emit a nearly diffraction-limited beam even at a high amplifier current. Adjustable wavelength output, modulators, and amplifiers are all inside a single package.With this architecture, the laser has demonstrated an order-of-magnitude more output power than its predecessors, and the tuning range has been enhanced by more than a factor of two. ... [read more]
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127.
| Single-Chip Laser Delivers Powerful Result
McCormick Press Release - January 7, 2016
From their use in telecommunication to detecting hazardous chemicals, lasers play a major role in our everyday lives. They keep us connected, keep us safe, and allow us to explore the dark corners of the universe. Now a Northwestern Engineering team has made this ever-important tool even simpler and more versatile by integrating a mid-infrared tunable laser with an on-chip amplifier. This breakthrough allows adjustable wavelength output, modulators, and amplifiers to be held inside a single package.With this architecture, the laser has demonstrated an order-of-magnitude more output power than its predecessors, and the tuning range has been enhanced by more than a factor of two. ... [read more]
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128.
| David Heydari Wins 1st Place at 2015 NDConnect Poster Session
Notre Dame Press Release - October 23, 2015
David Heydari, a senior working with Professor Razeghi and majoring in electrical engineering at Northwestern, won first place and $3,000 in the NDConnect 2015 undergraduate research competition at Notre Dame on October 23 for his project on “High-power quantum cascade lasers with angled cavities.†... [read more]
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129.
| Razeghi Gives an Overview of the CQD's Research Activites
University of Illinois-Urbana Champaigine & NSF Nano-Hub - April 2, 2015
Link to video Pretention ... [read more]
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130.
| Tilted Laser Cavities Make Brighter Beams
McCormick Press Release - March 16, 2015
A simple tilt of geometry recently made quantum cascade lasers (QCLs) even brighter.
Led by Manijeh Razeghi, the Walter P. Murphy Professor of Electrical Engineering and Computer Science, a team of researchers in the McCormick School of Engineering has designed a new laser technology with high power and high brightness. QCLs emit mid- to far-range infrared radiation that can be used for the detection of gases, chemicals, and pollutants in the atmosphere.
Good beam quality is necessary for sending infrared light across great distances, but few structures have been able to achieve both high power and high brightness. Razeghi’s group in the Center for Quantum Devices was able to achieve this using a remarkably simple technique: tilting the laser cavity. ... [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