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:3/28/2017)... ... March 28, 2017 , ... ... SWB805 MultiMountTM weigh modules. These weigh modules are designed according to European ... Foundation (NSF). , As fully integrated weighing solutions, SWB805 MultiMount weigh modules ...
(Date:3/27/2017)... 2017 Roka Bioscience, Inc. (NASDAQ: ROKA), a molecular ... detection of foodborne pathogens,  today announced that Mary Duseau ... 2017 Convention on March 29 at 9:50am ET. The conference ... About Roka Bioscience ... Roka Bioscience is a molecular ...
(Date:3/27/2017)... 2017 Infectex Ltd., a Russian portfolio company of Maxwell Biotech ... SQ109 added to the standard drug therapy regimen in patients with multidrug-resistant pulmonary tuberculosis ... ( USA ) and the US National Institutes of Health. ... ... Fund Logo ...
(Date:3/27/2017)... ... March 27, 2017 , ... PMG Research is ... (CTC) conference presented by The Conference Forum in Boston on April 3-4, 2017. The ... drive improved clinical trial outcomes and bring them closer to the patient. Clinical Trial ...
Breaking Biology Technology:
(Date:2/28/2017)... BARCELONA , Spanien, 27. Februar 2017 /PRNewswire/ ... durch Iris-Scan, wird seine erstklassige biometrische Lösung ... Snapdragon™ 835 mit X16 LTE auf dem ... 2. März) am Qualcomm-Stand in Halle 3, ... 835-Prozessor beinhaltet die Sicherheitsplattform Qualcomm Haven™ – ...
(Date:2/21/2017)... PORTLAND, Ore. , Feb. 22, 2017  IBM ... Companies (Avamere Health Services, Infinity Rehab, Signature Hospice, Home ... that will apply the power of IBM cognitive computing ... health centers. By analyzing data streaming from sensors in ... physical and environmental conditions, and obtain deeper learnings into ...
(Date:2/13/2017)... 2017 Former 9/11 Commission border counsel and ... Janice Kephart of Identity Strategy Partners, LLP, today ... "Executive Order: Protecting the Nation From Foreign Terrorist ... "As President Trump,s ,Travel Ban, Executive Order gains ... banned the travel ban, it is important that our ...
Breaking Biology News(10 mins):