Observatorio de I+D+i UPM

Memorias de investigación
Courses, Seminars and tutorials:
Spectroscopy of droplet epitaxial GaAs nanoemitters, Dr Marco Abbarchi
Research Areas
  • Engineering
Droplet epitaxy (DE) is a non-conventional growth technique based on molecular beam epitaxy. This method, differently from strain-induced 3-dimensional nanostructures, enables the growth of lattice-matched and strain-free selfassembled III-V nanoemitters. Thanks to the versatility of the DE, different kinds of nanostructures can be realized: quantum dots, coupled quantum dots, quantum rings, multiple concentric quantum rings, quantum disks, as well as combinations of these different shapes. Moreover, DE enables the growth on different substrates orientations (such as the (100), (311)A, (111)A) and, most importantly, it makes possible the growth of bright III-V quantum emitters on substates made of Silicon and Germanium.In this seminar I will introduce some features of growth and photoluminescence spectroscopy of single GaAs/AlGaAs DE nanostructures. In particular I will concentrate on quantum dots and rings addressing their electronic structure, fine structure and line broadening: I will show how composition, shape, geometrical anisotropy and disorder rule the optical properties and how, thanks to recent advances in the DE method, bright and sharp photoluminescence lines can be obtained in circular symmetric quantum dots. Finally I will show recent advancesin the growth of hybrid III-V/IV quantum dots.
Seminarios del ISOM
Entity Nationality
Sin nacionalidad
Start Date
End Date
  • Autor: Alvaro de Guzman Fernandez Gonzalez (UPM)
  • Autor: Dr Marco Abbarchi
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Dispositivos Semiconductores del ISOM
  • Centro o Instituto I+D+i: Instituto Universitario de Sistemas Optoelectrónicos y Microtecnología
  • Departamento: Ingeniería Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)