Navigation Links
Laser pulses control single electrons in complex molecules
Date:9/1/2009

hell of the complex molecule carbon monoxide (CO) utilizing the electric field waveform of laser pulses. Carbon monoxide has 14 electrons. With increasing number of electrons in the molecule the control over single electrons becomes difficult as their states lie energetically very close to each other.

In their experiments the scientists used visible (740 nm) laser pulses with 4 femtoseconds duration. The control was experimentally determined via an asymmetric distribution of C+ and of O+ fragments after the breaking of the molecular bond. The measurement of C+ and O+ fragments implies a dynamic charge shift along the molecular axis in one or the other direction, controlled via the laser pulse.

The femtosecond laser pulses initially detached an electron from a CO molecule. Subsequently the electron was driven by the laser field away from and back to the ion, where it transferred its energy in a collision. The whole process took only ca. 1.7 femtoseconds. "The collision produces an electronic wave packet which induces a directional movement of electrons along the molecular axis," says Regina de Vivie-Riedle. "The excitation and subsequent interaction with the remainder of the intense laser pulse leads to a coupling of electron and nuclear motion and gives a contribution to the observed asymmetry," explains Matthias Kling.

The scientists could also image the structure and form of the outer two electron orbitals of carbon monoxide via the ionization process. The extremely short femtosecond laser pulses allowed the scientists to explore this process in the outermost orbitals. They found the ionization of the molecules to take place with a distinct angular dependence with respect to the laser polarization direction. This observation was found to be in good agreement with theoretical calculations and also gave a contribution to the observed asymmetry. The scientists could show that the strength of this asymmetry strongly depends on the duration of t
'/>"/>

Contact: Prof. Dr. Regina de Vivie-Riedle
regina.de_vivie@cup.uni-muenchen.de
49-892-180-77533
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. LASIK Expert Edward Manche, M.D., of the Stanford Eye Laser Center Joins Top Surgeons Listed at the Trusted LASIK Surgeons Directory
2. New nanolaser key to future optical computers and technologies
3. Breaking barriers with nanoscale lasers
4. Laser technology creates new forms of metal and enhances aircraft performance
5. Orange County Laser Surgeon Nissan Pilest Tapped as Keynote Speaker at Fraxel & Thermage User Forum Held at Beckman Laser Institute
6. Regular light bulbs made super-efficient with ultra-fast laser
7. New nanotube coating enables novel laser power meter
8. Scientists demonstrate laser with controlled polarization
9. SeqWright to Invest in LaserGens Novel Lightning Terminators(TM)
10. Trusted LASIK Surgeons Welcomes Leading Laser Expert and Inventor Jon Dishler, M.D., to Its Unique LASIK Eye Surgeon Directory for Consumers
11. Plasmonic whispering gallery microcavity paves the way to future nanolasers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/20/2014)... Inc. (TSXV: BRM) ("Biorem" or "the Company") today announced four new ... and provides a good start to Q4.  The orders are for ... and one in the Middle East . ... Peter Bruijns , President & CEO. "Total bidding activity and ... have been for any complete year since the company has tracked ...
(Date:10/20/2014)... October 20, 2014 OncLive® ... Kimmel Cancer Center at Thomas Jefferson University has ... Through the Strategic Alliance Partnership program, the Sidney ... collaborate to raise awareness of the Center’s cutting-edge ... other projects. Clinicians and other health care professionals ...
(Date:10/19/2014)... OCTOBER 20-22, 2014: The ... ABIM will take place at the Congress ... 2014 is now available at http://www.abim.ch ... and organizations from all over the globe ... the latest products and developments on the ...
(Date:10/19/2014)... The Asia-Pacific Speech Analytics market report ... with analysis and forecast of revenue. This market is ... $208 million by 2019, at a Compound Annual Growth ... Browse through the TOC of the Asia-Pacific Speech Analytics ... analysis provided. It also provides a glimpse of the ...
Breaking Biology Technology:Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 2The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 4
... , PRINCETON, N.J., July 15 ... a license agreement with Merck KGaA, Darmstadt, Germany, providing the ... Technology platform for the research, development and commercialization of their ... , "We are extremely pleased ...
... July 14 /PRNewswire-FirstCall/ - Vasogen Inc. (NASDAQ: VSGN ; ... and six months ended May 31, 2009. All dollar amounts ... At May 31, 2009, our cash and cash equivalents totaled ... Our net cash used in operating activities for the three ...
... , , , LAKE ... technology company focused on improving blood collection, separation, safety and ... agreement with Verax Biomedical Incorporated to market, sell and distribute ... used to detect bacterial contaminants in donated blood platelets. ...
Cached Biology Technology:BioWa Announces License of POTELLIGENT(R) Technology to Merck KGaA 2Vasogen Announces Second Quarter 2009 Results 2Vasogen Announces Second Quarter 2009 Results 3Vasogen Announces Second Quarter 2009 Results 4Vasogen Announces Second Quarter 2009 Results 5Vasogen Announces Second Quarter 2009 Results 6Vasogen Announces Second Quarter 2009 Results 7Vasogen Announces Second Quarter 2009 Results 8Vasogen Announces Second Quarter 2009 Results 9Vasogen Announces Second Quarter 2009 Results 10Improving Transfusion Safety: Fenwal, Verax Biomedical Sign Agreement for Rapid, Point-of-Care Bacteria Test 2Improving Transfusion Safety: Fenwal, Verax Biomedical Sign Agreement for Rapid, Point-of-Care Bacteria Test 3
(Date:10/14/2014)... – Scientists have sequenced the house fly genome for ... might expect from an insect that thrives in pathogen-rich ... Oct. 14 in the journal Genome Biology , ... and of how flies quickly adapt to resist insecticides, ... house flies (Musca domestica) carry and transmit more than ...
(Date:10/14/2014)... – October 14, 2014 – Scientists from The Scripps ... the National Institutes of Health (NIH) to lead an ... hemorrhagic fever disease in Africa. The study aims to ... some patients die, while others survive the inflection. ... the basic mechanism of how Lassa fever virus causes ...
(Date:10/14/2014)... October 14, 2014 – Over the past decades, we ... institutions to meet the needs of infants for social ... these infants to thrive. , Infancy and ... of the cortex. A generation of research suggests that ... cortical development and cognitive function. In contrast, deprivation and ...
Breaking Biology News(10 mins):House fly genome reveals expanded immune system 2Scripps Research Institute team receives $6.6 million to investigate deadly Lassa virus 2Institutional rearing may increase risk attention-deficit disorder 2
... a team led by researchers from Caltech has for ... of chemoreceptorsthe receptors that sense and respond to chemical ... specific architecture is the same throughout a wide variety ... stable, universal structure that has been conserved over evolutionary ...
... new university/industry network to pursue the development of biomaterials, ... increasing incidence of eye disease. The 20/20: NSERC ... as part of the Natural Sciences and Engineering Research ... Minister of State (Science and Technology) Gary Goodyear today ...
... cell researcher Treena Livingston Arinzeh will discuss current stem cell ... for bone fracture and osteoarthritis treatments, spinal cord repair, and ... The event will be held Sept. 29, 2009, at ... floor of the NJIT Campus Center. The ...
Cached Biology News:Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 2Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 3Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 4New research network at McMaster aims to build a better eye 2
Request Info...
Designed for use with any of the Agencourt kits in tube format....
Collected from animals that are 16 to 18 months old. Sterile, Cell culture tested, ID clarifier: USA Origin...
... glass plates, bar clamp, and a built-in ... these units are:, safety interlock lids , ... upper and lower reservoirs have drains with ... of buffer solutions , leveling base with ...
Biology Products: