Journal of Physical Chemistry & Biophysics
Open Access
ISSN: 2161-0398
+44 1478 350008
ISSN: 2161-0398
+44 1478 350008
Angelo Angelini
Polytechnic of Turin, Italy
Scientific Tracks Abstracts: J Phys Chem Biophys
An overview of recent results on photon management through surface modes on purely dielectric multilayers is provided. Diffraction as well as guidance and confinement of Bloch Surface Waves (BSW) are shown, and a particular focus on nearfield coupling of emitters with BSW modes is provided. The ability of modifying the radiation pattern of emitters by employing nanostructured surfaces is gaining growing attention in a variety of applications related to nanophotonics, such as fewmolecule and quantum emitters detection. In this framework, Surface Plasmon Coupled Emission (SPCE) has demonstrated to be an effective way to address this issue. Generally, plasmonic-based mechanisms exploit a near-field transfer of energy from the emitters to plasmonic modes. However, the main drawback in using plasmons on metal is represented by ohmic losses, producing broad resonances and absorption of useful signal. An effect similar to SPCE occurs on properly tailored one dimensional photonic crystals sustaining BSWs. Due to the very low absorption coefficient of the 1DCP materials, the BSWcoupled fluorescence can propagate for longer distances as compared to plasmons. In addition, the use of dielectric structures offers interesting advantages such as a wide spectral tunability (from UV to IR); the possibility to have either TE or TM polarized BSW and higher Q-factors. By properly structuring the surface of 1DPC, light coupled to BSWs can be manipulated in several ways (e.g. diffracted, guided, and focused). In particular, spontaneous emission of emitters lying on the surface of 1DPC can be efficiently beamed out in arbitrary directions with low divergence.
Angelo Angelini has completed his PhD from Polytechnic of Turin. During his studies, he spent 6 months at Columbia University, Biomedical Engineering department. He is currently a Research Fellow at Polytechnic of Turin. He has published more than 10 papers in reputed journals.
Email: d027461@polito.it