Ricerc@Sapienza

The Sapienza Terahertz group of Prof. Stefano Lupi is located at Department of Physics University La Sapienza, Rome, Italy. The interests of the group are focused on the exotic low-energy excitations in condensed matter physics ranging from Dirac electrons in Topological Insulators and graphene, High-Tc superconductors, plasmonics and metamaterials, the development of new sources and new instrumentations for IR and THz spectroscopy, and IR and THz investigations in biophysics and condensed matter. The Sapienza Terahertz consists in two laboratories.

Il gruppo di ricerca si occupa dello studio della struttura locale e della struttura elettronica dei superconduttori emergenti e di altri materiali funzionali. Obiettivo della ricerca è lo studio del rapporto struttura-funzione e il controllo delle proprietà funzionali attraverso la manipolazione delle strutture a livello nanoscopico. Il laboratorio è dotato di un sistema di ultra alto vuoto per le misure spettroscopiche con elettroni (XPS, UPS). I materiali sono caratterizzati per la morfologia mediante microscopia a forza atomica (AFM).

Laboratorio didattico per studenti corso laurea magistrale in Fisica curriculum Particle and Astroparticle Physics.

Varie postazione sperimentali con strumentazione per rivelazione di particelle (compresi rivelatori a gas  e con alimentazione ad alta tensione).

Ogni anno vi accedono circa 60 studenti

Attività svolta:

The research activities of our group (Optical Spectroscopy of Nanostructured Materials) focus on the electronic properties of nanostructured semiconductor materials either spontaneously formed or artificially created To this end we employ optical spectroscopy techniques based on photoluminescence (PL) and its variants (PL excitation PL under magnetic field and other external perturbations) Raman scattering and second order photon correlation techniques Post growth hydrogen irradiation is also employed as a powerful tool to fine tune the material electronic properties

Laboratory for advanced quantum-optical spectroscopy

The aim of the laboratory is to investigate how physical properties arise when solid state systems shrink to the nanoscale. It is mainly devoted to atomic level controlled growth of molecular systems, low dimensional structures with desired morphology and spacing on suitable nano-structured templates. A special effort is dedicated to the growth of graphene on metallic substrates via chemical vapour deposition, graphene nanoribbons by molecular precursors, graphene nano- and micro-porous systems (see Fig. 1, right panel).

Diffusione della luce su campioni di materia soffice