Navigation Links
Scientists demonstrate multibeam, multi-functional lasers
Date:11/30/2009

Cambridge, Mass November 30, 2009 An international team of applied scientists from Harvard, Hamamatsu Photonics, and ETH Zrich have demonstrated compact, multibeam, and multi-wavelength lasers emitting in the invisible part of the light spectrum (infrared). By contrast, typical lasers emit a single light beam of a well-defined wavelength. The innovative multibeam lasers have potential use in applications related to remote chemical sensing pollution monitoring, optical wireless, and interferometry.

The research was led by postdoctoral researcher Nanfang Yu and Federico Capasso, Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical Engineering, both at the Harvard School of Engineering and Applied Sciences (SEAS); Hirofumi Kan, General Manager of the Laser Group at Hamamatsu Photonics; and Jrme Faist, Professor at ETH Zrich. The findings appeared online in the October 23 issue of Applied Physics Letters and will appear as a December 7 cover story.

"We have demonstrated devices that can create highly directional laser beams pointing in different directions either at the same or at different wavelengths," says Capasso. "This could have major implications for parallel high-throughput monitoring of multiple chemicals in the atmosphere or on the ground and be used, for example, for studying hazardous trace gases and aerosols, monitoring greenhouse gases, detecting chemical agents on the battlefield, and mapping biomass levels in forests."

The more versatile laser is a descendant of the quantum cascade laser (QCL), invented and first demonstrated by Capasso, Faist, and their collaborators at Bell Labs in 1994. Commercially available QCLs, made by stacking ultra-thin atomic layers of semiconductor materials on top of one another, can be custom designed to emit a well -defined infrared wavelength for a specific application or be made to emit simultaneously multiple wavelengths. To achieve multiple beams, the researchers patterned the laser facet with metallic structures that behave as highly directional antennas and then beam the light in different directions.

"Having multibeam and multi-wavelength options will provide unprecedented flexibility. The ability to emit multiple wavelengths is ideal for generating a quantitative map of the concentration of multiple chemicals in the atmosphere," explains Kan. "Profiles of these atmospheric componentsas a function of altitude or locationare critically important for environmental monitoring, weather forecasting, and climate modeling."


'/>"/>

Contact: Michael Patrick Rutter
mrutter@seas.harvard.edu
617-496-3815
Harvard University
Source:Eurekalert  

Related biology technology :

1. Forensic Scientists at Kansas City Crime Lab Release Validation Report Confirming Zygems forensicGEM(R) Kit is a Reliable, Rapid Method for Extracting DNA From Saliva
2. Biomodels Scientists Report Development of a Novel Model for Cancer Treatment-Related Fatigue
3. Scientists develop novel method to generate functional hepatocytes for drug testing
4. Harvard scientists bend nanowires into 2-D and 3-D structures
5. Scientists use math modeling to predict unknown biological mechanism of regulation
6. Weed Scientists Take Steps to Protect Rare Orchid
7. Alzheimers Drug Discovery Foundation and the Lewy Body Dementia Association Invite Scientists to Apply for LBD Grant Award Program
8. Invasive Saltcedar Triggers Lively Debate among Weed Scientists and Land Managers
9. UK scientists developing intelligent harvesting robot to save farms up to 100,000 a year
10. NIST scientists study how to stack the deck for organic solar power
11. UCR scientists manipulate ripples in graphene, enabling strain-based graphene electronics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists demonstrate multibeam, multi-functional lasers
(Date:2/11/2016)... NY (PRWEB) , ... February ... ... a business-to-business publication dedicated to delivering cutting-edge information focused on the development ... Life Sciences to become a premier sponsor of the 2016 BioProcess International ...
(Date:2/11/2016)... ... February 11, 2016 , ... Reichert ... years, continues today to pursue the highest level of accuracy and quality with ... AR9 Refractometer and the AR5 Refractometer. Accurate, reliable and tough enough for ...
(Date:2/10/2016)... 10, 2016 Early-career researchers from ... Peru , Uganda and Yemen ... health and nutrition   Indonesia , ... and Yemen are being honored for their ... are also celebrated for mentoring young women scientists who are pursuing careers ...
(Date:2/10/2016)... and New York, New York (PRWEB) , ... ... ... Regeneron Pharmaceuticals Inc. (NASDAQ: REGN) today announced that it has joined ... new vaccines and immunotherapies for infectious diseases and cancer. , The ...
Breaking Biology Technology:
(Date:1/28/2016)... (NASDAQ: SYNA ), a leading developer of human interface solutions, ... 2015. --> --> Net ... compared to the comparable quarter last year to $470.5 million. Net ... or $0.93 per diluted share. --> ... fiscal 2016 grew 9 percent over the prior year period to ...
(Date:1/25/2016)... , Jan. 25, 2016   Unisys Corporation (NYSE: ... John F. Kennedy (JFK) International Airport, New York City ... (CBP) identify imposters attempting to enter the United States ... to them. pilot testing of the system at ... three terminals at JFK during January 2016. --> pilot ...
(Date:1/22/2016)... 2016 http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ... the  "Global Behavioral Biometric Market 2016-2020" ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the ... Market 2016-2020"  report to their offering. ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the addition ...
Breaking Biology News(10 mins):