Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation

Sergio Bietti, Francesco Basso Basset, David Scarpellini, Alexey Fedorov, Andrea Ballabio, Luca Esposito, Martin Elborg, Takashi Kuroda, Akos Nemcsics, L. Tóth, Cristian Manzoni, Caterina Vozzi, Stefano Sanguinetti

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A hybrid metal-semiconductor nanosystem for the generation of THz radiation, based on the fabrication of GaAs quantum molecules-Ga metal nanoparticles complexes through a self assembly approach, is proposed. The role of the growth parameters, the substrate temperature, the Ga and As flux during the quantum dot molecule (QDM) fabrication and the metal nanoparticle alignment are discussed. The tuning of the relative positioning of QDMs and metal nanoparticles is obtained through the careful control of Ga droplet nucleation sites via Ga surface diffusion. The electronic structure of a typical QDM was evaluated on the base of the morphological characterizations performed by atomic force microscopy and cross sectional scanning electron microscopy, and the predicted results confirmed by micro-photoluminescence experiments, showing that the Ga metal nanoparticle-GaAs quantum molecule complexes are suitable for terahertz generation from intraband transition.

Original languageEnglish
Article number365602
JournalNanotechnology
Volume29
Issue number36
DOIs
Publication statusPublished - Jul 2 2018

Fingerprint

Metal nanoparticles
Molecules
Semiconductor quantum dots
Nanosystems
Fabrication
Surface diffusion
Self assembly
Electronic structure
Atomic force microscopy
Photoluminescence
Nucleation
Tuning
Metals
Semiconductor materials
Fluxes
Radiation
Scanning electron microscopy
gallium arsenide
Substrates
Experiments

Keywords

  • atomic force microscopy
  • droplet epitaxy
  • IIIV semiconductors
  • molecular beam epitaxy
  • nano-positioning
  • quantum nanostructures

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Bietti, S., Basset, F. B., Scarpellini, D., Fedorov, A., Ballabio, A., Esposito, L., ... Sanguinetti, S. (2018). Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation. Nanotechnology, 29(36), [365602]. https://doi.org/10.1088/1361-6528/aacd20

Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation. / Bietti, Sergio; Basset, Francesco Basso; Scarpellini, David; Fedorov, Alexey; Ballabio, Andrea; Esposito, Luca; Elborg, Martin; Kuroda, Takashi; Nemcsics, Akos; Tóth, L.; Manzoni, Cristian; Vozzi, Caterina; Sanguinetti, Stefano.

In: Nanotechnology, Vol. 29, No. 36, 365602, 02.07.2018.

Research output: Contribution to journalArticle

Bietti, S, Basset, FB, Scarpellini, D, Fedorov, A, Ballabio, A, Esposito, L, Elborg, M, Kuroda, T, Nemcsics, A, Tóth, L, Manzoni, C, Vozzi, C & Sanguinetti, S 2018, 'Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation', Nanotechnology, vol. 29, no. 36, 365602. https://doi.org/10.1088/1361-6528/aacd20
Bietti S, Basset FB, Scarpellini D, Fedorov A, Ballabio A, Esposito L et al. Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation. Nanotechnology. 2018 Jul 2;29(36). 365602. https://doi.org/10.1088/1361-6528/aacd20
Bietti, Sergio ; Basset, Francesco Basso ; Scarpellini, David ; Fedorov, Alexey ; Ballabio, Andrea ; Esposito, Luca ; Elborg, Martin ; Kuroda, Takashi ; Nemcsics, Akos ; Tóth, L. ; Manzoni, Cristian ; Vozzi, Caterina ; Sanguinetti, Stefano. / Ga metal nanoparticle-GaAs quantum molecule complexes for terahertz generation. In: Nanotechnology. 2018 ; Vol. 29, No. 36.
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