Matches in SemOpenAlex for { <https://semopenalex.org/work/W963695537> ?p ?o ?g. }
Showing items 1 to 67 of
67
with 100 items per page.
- W963695537 abstract "The use of nanostructures in the active regions of optoelectronic devices has already demonstrated to improve the previously predicted figures of merit of, for example, laser devices with quantum wells. Up to know it has been demonstrated the possibility of QD working devices at 1.3 micron. Going beyond that wavelength up to 1.55 micron in GaAs based materials is a very difficult task, although very interesting for its direct applications in telecommunications. For this purpose it is necessary to control the emission wavelength from InGaAs quantum dots (QDs) which is limited by both the In concentration (through the band gap blueshift at higher Ga concentrations) and the size of the dots (through electron confinement effects). Most groups have attempted to obtain pure InAs QDs with sharp interfaces with the GaAs matrix. This results in a hard confinement potential and consequently the wavelength is mostly limited by the quantum confinement effect. We are exploring an alternative strategy: growing larger InGaAs alloyed QDs, so that the emission wavelength is limited by the QD composition rather than by the quantum confinement effect. We use both conventional molecular beam epitaxy (MBE) and Atomic Layer MBE (ALMBE) to grow an InGaAs capping layer, the later having the advantage of allowing a wider range (200<T<500) of growth temperature, for modifying the relaxation critical thickness, In segregation and alloy intermixing during the capping process. There are mainly two advantages to our approach: less abrupt changes of lattice parameter, and more wavelength redshift per In content as the slope of the band gap vs lattice parameter curve decreases at high In concentrations. Photoluminescence at wavelengths beyond 1.3 microns at room temperature is demonstrated. This work has been supported by the European Commission Growth program NANOMAT project, contract no. G5RD-CT-2001-00545 and by Spanish MCYT under NANOSELF project TIC2002-04096-C03-03." @default.
- W963695537 created "2016-06-24" @default.
- W963695537 creator A5002033171 @default.
- W963695537 creator A5018189616 @default.
- W963695537 creator A5033022453 @default.
- W963695537 creator A5068510855 @default.
- W963695537 creator A5076908103 @default.
- W963695537 date "2004-09-01" @default.
- W963695537 modified "2023-09-27" @default.
- W963695537 title "InGaAs Quantum dots with soft confinement potential for longer wavelength emission" @default.
- W963695537 hasPublicationYear "2004" @default.
- W963695537 type Work @default.
- W963695537 sameAs 963695537 @default.
- W963695537 citedByCount "0" @default.
- W963695537 crossrefType "journal-article" @default.
- W963695537 hasAuthorship W963695537A5002033171 @default.
- W963695537 hasAuthorship W963695537A5018189616 @default.
- W963695537 hasAuthorship W963695537A5033022453 @default.
- W963695537 hasAuthorship W963695537A5068510855 @default.
- W963695537 hasAuthorship W963695537A5076908103 @default.
- W963695537 hasConcept C110738630 @default.
- W963695537 hasConcept C124657808 @default.
- W963695537 hasConcept C171250308 @default.
- W963695537 hasConcept C183152904 @default.
- W963695537 hasConcept C192562407 @default.
- W963695537 hasConcept C2779227376 @default.
- W963695537 hasConcept C3792809 @default.
- W963695537 hasConcept C49040817 @default.
- W963695537 hasConcept C6260449 @default.
- W963695537 hasConcept C85080765 @default.
- W963695537 hasConceptScore W963695537C110738630 @default.
- W963695537 hasConceptScore W963695537C124657808 @default.
- W963695537 hasConceptScore W963695537C171250308 @default.
- W963695537 hasConceptScore W963695537C183152904 @default.
- W963695537 hasConceptScore W963695537C192562407 @default.
- W963695537 hasConceptScore W963695537C2779227376 @default.
- W963695537 hasConceptScore W963695537C3792809 @default.
- W963695537 hasConceptScore W963695537C49040817 @default.
- W963695537 hasConceptScore W963695537C6260449 @default.
- W963695537 hasConceptScore W963695537C85080765 @default.
- W963695537 hasLocation W9636955371 @default.
- W963695537 hasOpenAccess W963695537 @default.
- W963695537 hasPrimaryLocation W9636955371 @default.
- W963695537 hasRelatedWork W14488195 @default.
- W963695537 hasRelatedWork W1986474653 @default.
- W963695537 hasRelatedWork W2002990708 @default.
- W963695537 hasRelatedWork W2011144078 @default.
- W963695537 hasRelatedWork W2040675242 @default.
- W963695537 hasRelatedWork W2051020995 @default.
- W963695537 hasRelatedWork W2065028254 @default.
- W963695537 hasRelatedWork W2075095407 @default.
- W963695537 hasRelatedWork W2087714300 @default.
- W963695537 hasRelatedWork W2096540830 @default.
- W963695537 hasRelatedWork W2139808482 @default.
- W963695537 hasRelatedWork W2185822472 @default.
- W963695537 hasRelatedWork W2339787618 @default.
- W963695537 hasRelatedWork W2358484613 @default.
- W963695537 hasRelatedWork W2372338565 @default.
- W963695537 hasRelatedWork W268763980 @default.
- W963695537 hasRelatedWork W2891505524 @default.
- W963695537 hasRelatedWork W3006623083 @default.
- W963695537 hasRelatedWork W3127352556 @default.
- W963695537 hasRelatedWork W583484869 @default.
- W963695537 isParatext "false" @default.
- W963695537 isRetracted "false" @default.
- W963695537 magId "963695537" @default.
- W963695537 workType "article" @default.