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Recent News and Articles on the Keywords: megan fellman + 847) 4913115 + contact  Related to the article below (Last Update: 5/12/2008)

Mt. Blue posts honor roll
Central Maine Morning Sentinel, ME - May 8, 2008
Honors: Amelia Allen, Tara Cautillo, Kaija Fellman, John Fitzmorris, Jennifer Hiltz, Matthew Lilley, Danielle Mason, Adam Meader, Brandon Plaisted, ...
Source: Google News

Key: Meeting M Journal J Funder F -
B Conservation, K Foods, A Naturalist - University of California-Berkeley - eurekalert.org
... California Institute of Technology. Contact: Megan Fellman fellman@northwestern.
edu 847-491-3115 Northwestern University. Public Release: 3 ...
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Women?s Studies in the Western United States -
KL Salley, BS Winkler, M Celeen, H Meck - NWSA Journal, 2004 - muse.jhu.edu
... Dr. Barbara Scott Winkler, Associate Professor and current Director of the SOU Program;
and Megan Celeen and ... Fellman, Anita Clair and Barbara A. Winstead. ...

Industry updates
SI Electricity - Journal of Failure Analysis and Prevention, 2002 - Springer
... For more information: Megan Fellman, Northwestern University; tel: 847/491-3115;
fellman@northwestern. edu; web: http://www.northwestern.edu/news/. ...

Key: Meeting Journal Funder Public Release: 23-Apr-2004
F Password, I Context, ML Portal - Contact - eurekalert.org
... NIH/National Institute of Deafness and Other Communication Disorders Contact: Megan
Fellman fellman@northwestern.edu 847-491-3115 Northwestern University. ...
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Key: Meeting Journal Funder -
E Letters, BP Ltd, AG Union - University of California-Berkeley - eurekalert.org
... Research, Defense Advanced Research Projects Agency, National Science Foundation,
National Institutes of Health Contact: Megan Fellman fellman@northwestern.edu ...
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Key: Meeting M Journal J Funder F -
PE Edition - University of California-Berkeley - eurekalert.org
... cells. US Department of Energy, BP Solar. Contact: Megan Fellman fellman@
northwestern.edu 847-491-3115 Northwestern University. Public ...
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[PDF] Nanotechnology and Civil Security
C Authors - nanowerk.com
... 1 Megan Fellman, ?Technology holds promise for infrared camera?, august 2005
http://www.northwestern.edu/univ-relations/media_relations/releases/2005/08 ...
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Outcomes of Inferonasal Baerveldt Glaucoma Drainage Implant Surgery. -
KH Harbick, PA Sidoti, DL Budenz, A Venkatraman, M … - Journal of Glaucoma, 2006 - glaucomajournal.com
... A MD??; Budenz, Donald L MD, MPH*; Venkatraman, Anna MS*; Bruther, Megan OD?; Grayson ...
of BGIs.19 That same year, Smith, Starita, and Fellman found that 65 ...
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[BOOK] Dude, You're a Fag: Masculinity and Sexuality in High School -
CJ Pascoe - 2007 - books.google.com
... Eli Sagan, Gordon Fellman, Michael Macy, Bernadette Brooten, Pamela Allara, Karen
Hansen, and ... I'm so happy to thank my partner, Megan Sheppard, for her role in ...

[PDF] BioSynthesis -
A Graduates - Reading - departments.bloomu.edu
... Al Bino Robert Blasko Megan Coyne Megan Enterline Megan Frantz Stephanie ... Jeff Fellman
is testing mutagenized strains of the fungus Neurospora tetrasperma with ...

Source: Google Scholar

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University

Laser sets records in power and energy efficiency

EVANSTON, Ill. --- The rise in global terrorism in recent years has brought significant attention to the needs for more advanced sensors and defense technologies to protect civilians and soldiers.

Next-generation laser-based defense systems are now being designed for this need, including the use of infrared countermeasures to protect aircraft from heat-seeking missiles and highly sensitive chemical detectors for reliable early detection of trace explosives and other toxins at a safe distance for personnel.

Since practical systems must be easily portable by a soldier, aircraft or unmanned vehicle, they must be lightweight, compact and power efficient. In addition, such systems also would need to be widely deployable and available to all soldiers, airplanes and public facilities, which requires a low production and operating cost. While several types of lasers exist today that can emit at the desired infrared wavelengths, none of these lasers meet the above requirements because they are either too expensive, not mass-producible, too fragile or require power-hungry and inefficient cryogenic refrigeration.

A new type of semiconductor-based laser, called the Quantum Cascade Laser (QCL), may soon change this situation. Like their computer chip cousins, semiconductors lasers are inherently compact and suitable for mass production, which has led to their widespread and low-cost use in everyday products, including CD and DVD players.

The Center for Quantum Devices (CQD) at Northwestern University, led by Manijeh Razeghi, Walter P. Murphy Professor of Electrical Engineering and Computer Science at the McCormick School of Engineering and Applied Science, has recently made great strides in laser design, material growth and laser fabrication that have greatly increased the output power and wall-plug efficiency (the ability to change electrical power into light) of QCLs.

The CQD now has demonstrated individual lasers, 300 of which can easily fit on a penny, 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. Furthermore, these lasers are extremely efficient in converting electricity to light, having a 10 percent wall-plug efficiency at room temperature and more than 18 percent wall-plug efficiency at lower temperatures. This represents a factor of two increase in laser performance, which is far superior to any competing laser technology at this wavelength.

###

These results have been submitted for publication, and Razeghi presented similar results at the Conference on Indium Phosphide and Related Materials, which took place in Japan this past May.
 
 
 
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