http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (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. There have been efforts to tune lasers so that different wavelengths can be achieved, but these lasers still emit light only in one direction, and one wavelength at a given time. All that could change, though. Harvard University scientists Federico Capasso and Nanfang Yu , in Cambridge, Massachusetts, have been working with an international team to develop a laser that offers multibeam emission. http://www.physorg.com/news177582639.html Physics Mon, 16 Nov 2009 09:50:01 EST news177582639 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, have invented a novel design of TeraHertz-ray, or T-ray, lasers. http://www.physorg.com/news175247920.html Nanotechnology Tue, 20 Oct 2009 08:59:07 EST news175247920 (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 for the ongoing development of this cutting-edge technology. The breakthrough involved measuring the intersubband relaxation time of charge states in silicon-germanium SiGe structures on a picosecond scale. Experiments have also shown that it is possible to control and extend these times. As a result, this body of work - currently published in Physical Review Letters and supported by the Austrian Science Fund FWF - represents a major advance in the development of data processing based on optoelectronic chips. http://www.physorg.com/news158922775.html Physics Tue, 14 Apr 2009 10:13:47 EST news158922775 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. http://www.physorg.com/news156522480.html Physics Tue, 17 Mar 2009 15:28:32 EST news156522480 (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 midinfrared. `Because of this, the midinfrared is an important wavelength range for trace gas sensing applications.` In addition the midinfrared is also of interest for applications such as thermal imaging, countermeasures, and even free space communication. http://www.physorg.com/news154609081.html Physics Mon, 23 Feb 2009 10:59:14 EST news154609081 A Princeton-led team of researchers has discovered an entirely new mechanism for making common electronic materials emit laser beams. The finding could lead to lasers that operate more efficiently and at higher temperatures than existing devices, and find applications in environmental monitoring and medical diagnostics. http://www.physorg.com/news149171030.html Physics Mon, 22 Dec 2008 12:23:50 EST news149171030