Linked Life Data

20173895

Source:http://linkedlifedata.com/resource/pubmed/id/20173895

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2010-2-22
pubmed:abstractText
We present a method to study current paths through quantum cascade lasers (QCLs). The temperature dependence of the current is measured at a fixed voltage. At low temperatures we find activation energies that correspond to the energy difference between the injector ground state and the upper laser level. At higher temperatures additional paths with larger activation energies are found. Application of this method to high performance QCLs based on strained InGaAs/InAlAs quantum wells and barriers with different band-offsets allows us to identify individual parasitic current paths through the devices. The results give insight into the transport properties of quantum cascade lasers thus providing a useful tool for device optimization.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1094-4087
pubmed:author
pubmed:issnType
Electronic
pubmed:day
18
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
746-53
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Activation energy study of electron transport in high performance short wavelengths quantum cascade lasers.
pubmed:affiliation
School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. pflugl@seas.harvard.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't