The Center for Quantum Devices in the News by    
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31.  
Single-Chip Laser Delivers Powerful Result
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]
 
32.  
David Heydari Wins 1st Place at 2015 NDConnect Poster Session
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]
 
33.  
Razeghi Gives an Overview of the CQD's Research Activites
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]
 
34.  
Tilted Laser Cavities Make Brighter Beams
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]
 
35.  
Building a More Versatile Frequency Comb
Building a More Versatile Frequency Comb
McCormick Press Release - February 16, 2015
Frequency combs are the rulers of light. By counting a wavelength’s many oscillations, they measure distance and time with extraordinary precision and speed. Since the discovery of optical frequency combs in the 1990s, many applications in metrology, spectroscopy, and frequency synthesis have emerged. Research led by Manijeh Razeghi at Northwestern University’s Center for Quantum Devices has overcome technical hurdles and demonstrated a room temperature, compact frequency comb based on a quantum cascade laser (QCL) with wide spectral coverage and high power. Unlike earlier frequency comb sources based on fundamentally mode-locked lasers or high-Q microresonators with intense optical pumping, Razeghi’s solution is based on QCLs and electrically pumped solid-state sources. ... [read more]
 
36.  
Abbas Haddadi Won the Best Paper Award for the Breakthroughs in Human-Centered Research
Abbas Haddadi Won the Best Paper Award for the Breakthroughs in Human-Centered Research
SPIE Photonics West 2015 Conference - February 11, 2015
Abbas Haddadi won the award for "Breakthrough in Human-Oriented Applications," at the SPIE WEST 2015 Conference, which was held February 7-12, 2015 at the Moscone Center in San Francisco, California. Abbas Haddadi received the honor for his paper, titled, "High-performance dual-band mid-/long-wavelength infrared InAs/InAsSb type-II superlattice-based photodetectors for medical thermography applications," SPIE Photonics West 2015 is the largest and most influential event for the laser and photonics community in North America: 20,000 attendees, two exhibitions, 1,250 exhibiting companies, a wide range of papers on biomedical optics, biophotonics, translational research, industrial lasers, optoelectronics, microfabrication, optical MEMS, and more. ... [read more]
 
37.  
Andy (Guanxi) Chen Won the Best Paper Award for the Breakthroughs in Human-Centered Research
Andy (Guanxi) Chen Won the Best Paper Award for the Breakthroughs in Human-Centered Research
SPIE Photonics West 2015 Conference - February 11, 2015
Andy (Guanxi) Chen won the award for "Breakthrough in Human-Oriented Applications," at the SPIE WEST 2015 Conference, which was held February 7-12, 2015 at the Moscone Center in San Francisco, California. Andy (Guanxi) Chen received the honor for his paper, titled, "World’s first pMp superlattice photodetectors enables high operating temperature infrared imaging," SPIE Photonics West 2015 is the largest and most influential event for the laser and photonics community in North America: 20,000 attendees, two exhibitions, 1,250 exhibiting companies, a wide range of papers on biomedical optics, biophotonics, translational research, industrial lasers, optoelectronics, microfabrication, optical MEMS, and more. ... [read more]
 
38.  
David Heydari Won the Best Paper Award for the Breakthroughs in Human-Centered Research
David Heydari Won the Best Paper Award for the Breakthroughs in Human-Centered Research
SPIE Photonics West 2015 Conference - February 11, 2015
David Heydari won the award for "Breakthrough in Human-Oriented Applications," at the SPIE WEST 2015 Conference, which was held February 7-12, 2015 at the Moscone Center in San Francisco, California. David Heydari received the honor for his paper, titled, "High-power quantum cascade lasers with angled cavities," SPIE Photonics West 2015 is the largest and most influential event for the laser and photonics community in North America: 20,000 attendees, two exhibitions, 1,250 exhibiting companies, a wide range of papers on biomedical optics, biophotonics, translational research, industrial lasers, optoelectronics, microfabrication, optical MEMS, and more. ... [read more]
 
39.  
Neelanjan Bandyopadhyay Won the Best Paper Award for the Breakthroughs in Human-Centered Research
Neelanjan Bandyopadhyay Won the Best Paper Award for the Breakthroughs in Human-Centered Research
SPIE Photonics West 2015 Conference - February 11, 2015
Neelanjan Bandyopadhyay won the award for "Breakthrough in Human-Oriented Applications," at the SPIE WEST 2015 Conference, which was held February 7-12, 2015 at the Moscone Center in San Francisco, California. Neelanjan Bandyopadhyay received the honor for his paper, titled, "Broadband quantum cascade laser tunable from 6.1 to 10.2µm," SPIE Photonics West 2015 is the largest and most influential event for the laser and photonics community in North America: 20,000 attendees, two exhibitions, 1,250 exhibiting companies, a wide range of papers on biomedical optics, biophotonics, translational research, industrial lasers, optoelectronics, microfabrication, optical MEMS, and more. ... [read more]
 
40.  
New Infrared Photodetectors Improve Medical Screening
New Infrared Photodetectors Improve Medical Screening
McCormick Press Release - January 29, 2015
Led by Professor Manijeh Razeghi, members of Northwestern University’s Center for Quantum Devices have improved the stability and lowered the cost of mid- and long-wavelength infrared photodetectors and focal plane array cameras. They achieved this by, first, using a novel type-II superlattice material called gallium-free indium-arsenide/indium-arsenide-antimonide or mercury-cadmium-telluride material. This design can be tuned to absorb a wide range of infrared wavelengths and a number of distinct infrared bands at the same time. This work is described in a paper published in the January 8 issue of Applied Physics Letters, the research was partially funded by DARPA, the Army Research Laboratory, the Air Force Research Laboratory, and NASA. ... [read more]
 

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