Resonant Raman scattering from silicon nanoparticles enhanced by magnetic response.
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.
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Pavel A
PA
Dmitriev
Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia.
Denis G
DG
Baranov
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Valentin A
VA
Milichko
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Sergey V
SV
Makarov
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru and St. Petersburg Academic University, St. Petersburg 194021, Russia.
Ivan S
IS
Mukhin
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Anton K
AK
Samusev
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Alexander E
AE
Krasnok
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru.
Pavel A
PA
Belov
ITMO University, St. Petersburg 197101, Russia. krasnokfiz@mail.ru and Nonlinear Physics Centre, Australian National University, Canberra ACT 2601, Australia.
Yuri S
YS
Kivshar