CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Dielectric Yagi-Uda nanoantennas driven by electron-hole plasma photoexcitation

S. Li ; S. Lepeshov ; R. Savelev ; Denis Baranov (Institutionen för fysik (Chalmers)) ; P. Belov ; A. Krasnok
Journal of Physics: Conference Series. 4th International School and Conference "Saint Petersburg OPEN 2017" on Optoelectronics, Photonics, Engineering and Nanostructures; St. Petersburg Academic UniversitySaint-Petersburg; Russian Federation; 3 April 2017 through 6 April 2017 (17426588). Vol. 917 (2017), 6,
[Konferensbidrag, refereegranskat]

All-dielectric nanophotonics based on high-index dielectric nanoparticles became a powerful platform for modern light science, providing many fascinating applications, including high-efficient nanoantennas and metamaterials. High-index dielectric nanostructures are of a special interest for nonlinear nanophotonics, where they demonstrate special types of optical nonlinearity, such as electron-hole plasma photoexcitation, which are not inherent to plasmonic nanostructures. Here, we propose a novel type of highly tunable all-dielectric Yagi-Uda nanoantennas, consisting of a chain of Si nanoparticles exciting by an electric dipole source, which allow tuning of their radiating properties via electron-hole plasma photoexcitation. We theoretically and numerically demonstrate the tuning of radiation power patterns and the Purcell effect by additional pumping of several boundary nanoparticles with relatively low peak intensities of fs-laser.



Denna post skapades 2017-12-29.
CPL Pubid: 254189

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för fysik (Chalmers)

Ämnesområden

Fysik

Chalmers infrastruktur