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SUMMARY:Metamaterial based devices for imaging\, sensing and biological ap
 plications in the terahertz frequency range - Dr Riccardo Degl'Innocenti
DTSTART:20150803T100000Z
DTEND:20150803T110000Z
UID:TALK60304@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:The terahertz frequency range (vacuum wavelength between 30 mm
  and 300 mm) is particularly appealing in many demanding sectors\, namely 
 scientific imaging\, biology\, spectroscopy\, communications and sensing. 
  Despite the impressive progress achieved recently by mid–infrared and t
 erahertz solid-state sources in terms of performance\, and the impressive 
 progress of time-domain spectroscopic systems\, in terms of costs\, compac
 tness and bandwidth\, the lack of suitable optoelectronic devices\, both p
 assive and active\, has so far hindered technology in this spectral region
  from reaching its full scientific potential. Metamaterials are normally e
 ngineered as planar\, artificial sub-wavelength metallic structures on a d
 ielectric substrate\, which are designed to have a resonant electro-magnet
 ic response to incident light which is determined mainly by their size and
  shape. They are therefore the ideal candidates to compensate for the poor
  response of materials at these frequencies. They can be implemented in va
 rious architectures and are normally realized in a variety of configuratio
 ns\, from split ring resonators (SRRs)\, to bow-tie and other resonant ant
 enna designs. Furthermore\, the sub-wavelength confinement offered by thes
 e plasmonic elements allows the achievement of unprecedented optical mode 
 concentration\, which has obvious advantages in device miniaturization\, s
 ensing efficiency\, or more in general\, in light-matter interactions. I w
 ill first introduce the research lines which are more pertinent to this pr
 oposal\, and then focus my attention on the future implementation of metam
 aterials for imaging\, sensing and biological applications in the terahert
 z range.\n\nBio: I obtained the Master’s in Physics from the University 
 of Florence in April 2001. I was then a PhD candidate and teaching assista
 nt in the department of Physics of the Federal Institute of Technology Zur
 ich (ETHZ)\, from March 2002 to April 2007\, in the Nonlinear Optics Group
  led by Prof. P Günter. I received the PhD in natural sciences (PhD thesi
 s ETH 17145: “Optical waveguides in BaB2O4 for second harmonic generatio
 n and electro-optic modulation in the deep UV”) in August 2007\, having 
 Prof. P. Günter and Prof. M. Sigrist as advisors. I then held a post-doc 
 position until May 2012 in the optoelectronics group of Prof. A. Tredicucc
 i in Scuola Normale Superiore di Pisa\, Italy. The main focus of my scient
 ific activity concerned the investigation of mid-infrared intersubband pol
 aritons and the realization of a terahertz near-field microscope. I am cur
 rently a research associate in the Semiconductor Physics (SP) group of the
  Cavendish Laboratory\, having been in the post since June 2012\, and I am
  working in the terahertz group. I am involved in developing novel teraher
 tz waveguides and quantum cascade lasers\, engineering both the quantum de
 signs and the photonic cavities. In parallel\, I have established a new re
 search line centered on metamaterial-based devices for terahertz modulatio
 n and sensing.\n
LOCATION:Kapitza Seminar Room\, Room 16 Kapitza Building\, Cavendish Labor
 atory
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