BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Nano-Phononics and Nano-Photonics with Semiconductor Nanowires
DTSTART:20190304T131500
DTEND:20190304T141500
DTSTAMP:20260405T164837Z
UID:67ae2a7fba6e0cba18100b9263ff32f134e01df1b9311ef3376c16dd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Marta De Luca\, Department of Physics\, University of Basel
 \nIf the capability to control photons and electrons in crystals has broug
 ht to an astonishing level of knowledge as well as to extraordinary techno
 logical achievements\, the manipulation of phonons is still quite unexplor
 ed\, despite it holds the promise of a quantum-mechanical control of heat 
 transport [1]. The quantum-mechanical behavior of phonons may also enable 
 the realization of coherent phonon transport via phonon engineering. Nanos
 tructures\, such as semiconducting nanowires (NWs)\, are an ideal platform
  for Nano-phononics\, since they offer the possibility to modify to a larg
 e extent the phonon properties by enabling the formation of different kind
 s of heterostructures and superlattices. I will discuss advanced methods b
 ased on Raman spectroscopy to determine the crystalline and phononic prope
 rties of nanoscale heterostructures [2] and show how the number of phonons
  modes can be decided à la carte by tuning the superlattice period in NWs
  [3].\nIn the second part of the talk\, I will focus on the optical proper
 ties of III-V NWs and their dependence on crystal structure useful for ban
 d-gap engineering [4]. I will also introduce the open challenges in Nano-p
 hotonics and present the new research line I am starting in Basel\, aimed 
 at developing a new approach for embedding site-controlled quantum dots in
  NWs. Dots-in-NWs with high brightness and high light extraction efficienc
 y can be the solid-state building blocks of novel photonic crystals and ph
 otonic circuits\, and open new paths in quantum communication.\n \nRefere
 nces\n[1] M. Maldovan\, Nature 503\, 209\, (2013).\n[2] C. Fasolato\, M. D
 e Luca\, D. Djomani\, et al.\, “Crystalline\, Phononic\, and Electronic 
 Properties of Heterostructured Polytypic Ge Nanowires by Raman Spectroscop
 y”. Nano Letters 18\, 7075 (2018).\n[3] M. De Luca\, C. Fasolato\, M. A.
  Verheijen\, et al.\, “Phononic properties à la carte in twinning super
 lattice GaP nanowires”\, under review (2019).\n[4] M. De Luca and A. Pol
 imeni\, “Electronic properties of wurtzite-phase InP nanowires determine
 d by optical and magneto-optical spectroscopy”\, Applied Physics Reviews
  4\, 041102 (2017).\nBio: Dr. Marta De Luca has just started an Ambizione 
 grant funded by the Swiss National Science Foundation in the Physics Depar
 tment of the University of Basel (Switzerland). Previously\, she was post-
 doc for three years in the same university in the Nanophononics group\, wh
 ere she has investigated phonon engineering in low-dimensional systems. Dr
 . De Luca graduated in Physics in 2011 at Sapienza University of Rome (Ita
 ly) and obtained the Ph.D. in Materials Science in 2014 from the same univ
 ersity. During the Ph.D. she investigated the optical and magneto-optical 
 properties of semiconductor nanowires\, for which she was awarded the “P
 iero Brovetto Prize” by the Italian Society of Physics.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR