Navigation Links
Stanford engineers create nanoscale nonlinear light source
Date:9/22/2011

Not long after the development of the first laser in 1960 scientists discovered that shining a beam through certain crystals produced light of a different color; more specifically, it produced light of exactly twice the frequency of the original. The phenomenon was dubbed second harmonic generation.

The green laser pointers in use today to illustrate presentations are based on this science, but producing such a beautiful emerald beam is no easy feat. The green light begins as an infrared ray that must be first processed through a crystal, various lenses and other optical elements before it can illuminate that PowerPoint on the screen before you.

It was later discovered that applying an electrical field to some crystals produced a similar, though weaker, beam of light. This second discovery, known as EFISH for electric-field-induced second harmonic light generation has amounted mostly to an interesting bit of scientific knowledge and little more. EFISH devices are big, demanding high-powered lasers, large crystals and thousands of volts of electricity to produce the effect. As a result, they are impractical for all but a few applications.

In a paper published today in Science, engineers from Stanford have demonstrated a new device that shrinks EFISH devices by orders of magnitude to the nanoscale. The result is an ultra-compact light source with both optical and electrical functions. Research implications for the device range from a better understanding of fundamental science to improved data communications.

Spring-loaded electrons

The device is based on the physical forces that bind electrons in orbit around a nucleus.

"It's like a spring," said Mark Brongersma, an associate professor of materials science and engineering at Stanford.

In most cases, when you shine a light on an atom, the added energy will pull the electron away from the positively charged nucleus very predictably, in a l
'/>"/>

Contact: Andrew Myers
admyers@stanford.edu
650-736-2245
Stanford School of Engineering
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Stanford and SanBio Announce a Clinical Trial of Cell Therapy for Stroke Disability
2. Stanford researchers use river water and salty ocean water to generate electricity
3. Auxogyn Licenses Non-invasive Embryo Assessment Technology From Stanford University
4. Univfy and Stanford Scientists Develop the First Personalized Prognostic Test to Predict Live Birth Outcomes with In Vitro Fertilization
5. Stanford scientists develop new way to grow adult stem cells in culture
6. New technique reinforces immune cells that seek and destroy cancer, says Stanford researcher
7. LASIK Expert Edward Manche, M.D., of the Stanford Eye Laser Center Joins Top Surgeons Listed at the Trusted LASIK Surgeons Directory
8. Eiger BioPharmaceuticals Acquires Exclusive License to Novel Hepatitis C Virus (HCV) Technology From Stanford University
9. Stanford researchers find a quicker, cheaper way to sort isotopes
10. Kornberg Associates Architects Selected to Develop Design for New Stanford University Imaging Center
11. Stanford writes in worlds smallest letters
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Stanford engineers create nanoscale nonlinear light source
(Date:7/13/2014)... -- The discovery 30 years ago of soccer-ball-shaped carbon ... nanotechnology research. Now, there appears to be a new ... Shanxi University and Tsinghua University in China have shown ... hollow molecular cage similar to a carbon buckyball. It,s ... only a matter of speculationdoes indeed exist. , "This ...
(Date:7/12/2014)... New York (PRWEB) July 12, 2014 ... analysis for various reagents used in the ... is driving the life science reagents market ... study include manufacturers and providers of life ... Reagents Market Report: http://www.transparencymarketresearch.com/life-sciences-reagents-analytical-reagents.html . , ...
(Date:7/11/2014)... , Not for release, publication or ... any jurisdiction where to do so would constitute a violation ... plc ("Shire" or the "Company") (LSE: SHP, NASDAQ: ... it has held a meeting with representatives of AbbVie. ... prior agreement or approval of AbbVie. A further ...
(Date:7/11/2014)... Research ( http://www.bccresearch.com ) reveals in its new report, ... MARKETS , the global market for digital polymerase chain ... This is estimated to grow to $490 billion in ... of 28.6%. , New digital PCR technology has created ... broader PCR field. The opportunities presented by this technology ...
Breaking Biology Technology:Researchers discover boron 'buckyball' 2Researchers discover boron 'buckyball' 3Transparency Market Research: Life Science Reagents Market- PCR Reagent Kits, Cell and Tissue Culture, Flow Cytometry, Electrophoresis and Chromatography 2Transparency Market Research: Life Science Reagents Market- PCR Reagent Kits, Cell and Tissue Culture, Flow Cytometry, Electrophoresis and Chromatography 3Shire plc - Statement re: Media Speculation 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 3
... blood, termed ,endometrial regenerative cells, (ERCs) are capable ... of advanced peripheral artery disease. A study published ... Translational Medicine demonstrates that when circulation-blocked mice were ... restored. , Critical limb ischemia, an ...
... SAN JOSE, Calif., Aug. 18 VNUS(R) Medical,Technologies, ... quarter results and,revises its full year 2008 guidance. ... operating expenses and certain balance sheet accounts,to record ... appropriately recorded in prior periods since the adoption ...
... (OTC Bulletin Board: ARNI), a clinical-stage biopharmaceutical company,focused on ... ended June 30, 2008., Net loss was $3.8 ... June 30, 2008, compared to $0.5 million, or $0.05 ... was $7.5 million, or $0.65 per share, for the,six ...
Cached Biology Technology:Limbs saved by menstrual blood stem cells 2VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 2VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 3VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 4Arno Therapeutics Announces Second Quarter 2008 Financial Results 2Arno Therapeutics Announces Second Quarter 2008 Financial Results 3Arno Therapeutics Announces Second Quarter 2008 Financial Results 4Arno Therapeutics Announces Second Quarter 2008 Financial Results 5
(Date:7/14/2014)... to the discovery and description of Rhipidocyrtus muiri ... turned out to represent a new genus and species. The ... from Borneo is discussed in a recent paper published in ... The holotype male, and only known specimen of Rhipidocyrtus ... subsequent to this it was transferred among several researchers in ...
(Date:7/14/2014)... consequence of aging? , Although it is widely thought ... risk of developing several common cancers decreases with age. ... decrease with age in the risk of developing certain ... puzzle was presented in a recent paper published in ... P. Brody of the Department of Biomedical Engineering at ...
(Date:7/13/2014)... A new study in women suggests that experiencing one ... single high-fat meal can slow the body,s metabolism, potentially ... about the previous day,s stressors before giving them a ... fat. The scientists then measured their metabolic rate ... and fat and took measures of blood sugar, ...
Breaking Biology News(10 mins):Serendipity at the Smithsonian: The 107-year journey of the beetle Rhipidocyrtus muiri 2Serendipity at the Smithsonian: The 107-year journey of the beetle Rhipidocyrtus muiri 3Weighty issue: Stress and high-fat meals combine to slow metabolism in women 2Weighty issue: Stress and high-fat meals combine to slow metabolism in women 3Weighty issue: Stress and high-fat meals combine to slow metabolism in women 4
... dengue fever will be the early targets of new ... The University of Queensland (UQ) and the University ... after Queensland Premier Anna Bligh announced $650,000 from the ... "Detection of the pathogens of two debilitating ...
... SAN DIEGO, CA (June 18, 2008): Despite recent controversies ... opportunities to create a more sustainable world, with applications ... for industrial and consumer uses, and high quality agricultural ... and technologies to be truly sustainable, they must be ...
... Earth,s periodic mass extinction events such as the sudden demise ... crashing asteroids and sky-darkening super volcanoes as culprits. But ... Nature , suggests that it is the ocean, and ... and sediment over the course of geologic time, that is ...
Cached Biology News:Biotechnology key to developing sustainable industries says international panel 2Biotechnology key to developing sustainable industries says international panel 3The mystery of mass extinctions is no longer murky 2The mystery of mass extinctions is no longer murky 3
Molecular Biological Resources offers bulk quantities of existing protein products. Please see the Chimerx divisions website for existing products and contact lloconne@molbiores.com for pricing....
... 9001:2000 Certified USDA Research Registered OLAW Assured ... Training AALAS Certified Technicians Documentation ... Documentation Upon Request Focus CRP ... all your custom immunology service needs. ...
... BalanceTalk XL provides balance data collection and ... Complete integration with Microsoft Excel , ... moisture analyzers , New balances can be added ... Collect data from multiple balances into one spreadsheet ...
Peptide-affinity Purified Polyclonal Antibody to Sphingolipid Receptor Edg8/S1P5...
Biology Products: