Resonant Raman scattering from silicon nanoparticles enhanced by magnetic response.
Pavel A Dmitriev, Denis G Baranov, Valentin A Milichko, Sergey V Makarov, Ivan S Mukhin, Anton K Samusev, Alexander E Krasnok, Pavel A Belov, Yuri S Kivshar
Author Information
Pavel A Dmitriev: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Denis G Baranov: Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia.
Valentin A Milichko: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Sergey V Makarov: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Ivan S Mukhin: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru and St. Petersburg Academic University, St. Petersburg 194021, Russia.
Anton K Samusev: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Alexander E Krasnok: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Pavel A Belov: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Yuri S Kivshar: ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru and Nonlinear Physics Centre, Australian National University, Canberra ACT 2601, Australia.
Enhancement of optical response with high-index dielectric nanoparticles is attributed to the excitation of their Mie-type magnetic and electric resonances. Here we study Raman scattering from crystalline silicon nanoparticles and reveal that magnetic dipole modes have a much stronger effect on the scattering than electric modes of the same order. We demonstrate experimentally a 140-fold enhancement of the Raman signal from individual silicon spherical nanoparticles at the magnetic dipole resonance. Our results confirm the importance of the optically-induced magnetic response of subwavelength dielectric nanoparticles for enhancing light-matter interactions.
