SPEAKER PROFILE |
 Dr. Riccardo Sapienza The Blackett Laboratory, Department of Physics, Imperial College London United Kingdom |
Dielectric antennas for single-emitter control
Abstract
Dielectric nanoscale antennas interfaced to individual emitters promise to deliver new quantum light sources by exploiting sculptured electromagnetic modes to boost light-matter interactions by many orders of magnitude, without the absorption, quenching and heating drawbacks of plasmonics.
I will report on 3D parabolic antennas surrounding an individual quantum dot, capable of directing individual photons into a low divergence beam (Θ1/2 = 13.5 deg), over all the visible range and with more than 96% extraction efficiency.
Moreover, I will discuss how a dielectric antenna, designed around and individual molecule, can boost light emission, with Purcell beyond ~1000, over a broad (~50 nm) bandwidth, offering a practical advantage for quantum technological applications.
Before that he was a Ramon y Cajal fellow in ICFO, the Institute of Photonic Science in Barcelona, within the group of Prof. Niek van Hulst, after a postdoc in ICMM-CSIC Madrid, in the group of Prof. Cefe Lopez.
He completed his PhD studies jointly in the Laboratories Kastler-Brossell (LKB) in Paris and in the European Laboratory for Nonlinear Spectroscopy (LENS) in Florence. He is alumnus of the University of Padova, Italy.
I will report on 3D parabolic antennas surrounding an individual quantum dot, capable of directing individual photons into a low divergence beam (Θ1/2 = 13.5 deg), over all the visible range and with more than 96% extraction efficiency.
Moreover, I will discuss how a dielectric antenna, designed around and individual molecule, can boost light emission, with Purcell beyond ~1000, over a broad (~50 nm) bandwidth, offering a practical advantage for quantum technological applications.
Bio
Riccardo Sapienza is a Reader in Experimental Solid-State Physics, at Imperial College London, joining from King’s College London where he held a lectureship in Physics.Before that he was a Ramon y Cajal fellow in ICFO, the Institute of Photonic Science in Barcelona, within the group of Prof. Niek van Hulst, after a postdoc in ICMM-CSIC Madrid, in the group of Prof. Cefe Lopez.
He completed his PhD studies jointly in the Laboratories Kastler-Brossell (LKB) in Paris and in the European Laboratory for Nonlinear Spectroscopy (LENS) in Florence. He is alumnus of the University of Padova, Italy.