News tagged with quantum cascade
Researchers demonstrate highly directional Terahertz laser rays
A collaborative team of applied scientists from Harvard University and the University of Leeds have demonstrated a new terahertz (THz) semiconductor laser that emits beams with a much smaller divergence than ...
Aug 08, 2010 |
4.7 / 5 (22) |
7
|
Tunable quantum cascade laser
(PhysOrg.com) -- One of the issues associated with lasers is their tunability. In many cases, if you want to produce a particular wavelength, you have to build a laser to accomplish this. In order to get another wavelength, ...
Jul 07, 2010 |
4.6 / 5 (20) |
1
|
Building a more versatile laser
(PhysOrg.com) -- One of the drawbacks associated with using semiconductor lasers is that many of them can only produce a beam of a single wavelength, and can only send that beam in one direction at a time. ...
Nov 16, 2009 |
4.5 / 5 (19) |
0
Scientists report first monolithic terahertz solid-state transceiver
Sandia National Laboratories researchers have taken the first steps toward reducing the size and enhancing the functionality of devices in the terahertz (THz) frequency spectrum.
Jun 29, 2010 |
4.7 / 5 (18) |
0
|
New laser technology prepares to revolutionize communications
As fiber optic technology continues to advance, it faces challenges from both its physical properties and its use of infrastructure. One emerging high-speed solution being developed at Stevens Institute of Technology uses ...
Mar 28, 2011 |
4.7 / 5 (14) |
1
|
Researchers demonstrate 100-watt-level mid-infrared lasers
Northwestern University researchers have achieved a breakthrough in quantum cascade laser output power, delivering 120 watts from a single device at room temperature.
Dec 01, 2009 |
4.4 / 5 (13) |
0
Nanotube-based terahertz polarizer nears perfection
(PhysOrg.com) -- Researchers at Rice University are using carbon nanotubes as the critical component of a robust terahertz polarizer that could accelerate the development of new security and communication ...
Jan 30, 2012 |
4.5 / 5 (11) |
1
|
Fine-tuned: A wholly new approach to tuning a laser's frequency
(PhysOrg.com) -- For more than 30 years, scientists have been trying to harness the power of terahertz radiation. Tucked between microwaves and infrared rays on the electromagnetic spectrum, terahertz rays ...
Dec 04, 2009 |
4.5 / 5 (10) |
2
Quantum dots as midinfrared emitters
(PhysOrg.com) -- “People are interested in the mid-infrared,” Dan Wasserman tells PhysOrg.com. Infrared light has a wavelength longer than visible light, and many molecules have numerous very strong optical resonances in the ...
Feb 23, 2009 |
4.1 / 5 (10) |
1
New quantum cascade lasers emit more light than heat
Northwestern University researchers have developed compact, mid-infrared laser diodes that generate more light than heat - a breakthroughs in quantum cascade laser efficiency.
Jan 11, 2010 |
5 / 5 (8) |
0
|
Life Expectancy on the Rise -- Even for Quantum States
(PhysOrg.com) -- For the first time, scientists have succeeded in measuring and controlling the lifetime of quantum states with potential use in optoelectronic chips. This achievement is highly significant ...
Apr 14, 2009 |
5 / 5 (6) |
0
Study on free-space optical communication shows experimental evidence of a unique atmospheric effect
Three members of the faculty at Stevens Institute of Technology recently collaborated on a paper focusing on free-space optical communication, which appears in the latest issue of Optics Express.
Mar 17, 2009 |
4.1 / 5 (7) |
2
Company Introduces Novel Nanotechnology for Revolutionizing Imaging Using T-rays
Yissum Research Development Company of the Hebrew University of Jerusalem today announced that Professor L.D. Shvartsman and Professor B. Laikhtman, from the Racah Institute of Physics at the Hebrew University of Jerusalem, ...
Oct 20, 2009 |
4.3 / 5 (6) |
0
New VECSEL could mean a step forward for spectroscopy
(PhysOrg.com) -- "Unfortunately, for spectroscopy, the beam quality of quantum cascade lasers is not satisfying," Hans Zogg tells PhysOrg.com. "We are developing lasers for the mid-infrared range which have an especially good b ...
Oct 25, 2010 |
4.8 / 5 (4) |
1
|
Standoff sensing enters new realm with dual-laser technique
(PhysOrg.com) -- Identifying chemicals from a distance could take a step forward with the introduction of a two-laser system being developed at the Department of Energy's Oak Ridge National Laboratory.
Mar 22, 2012 |
5 / 5 (3) |
0
|
