TY - JOUR
T1 - Boosting third-harmonic generation by a mirror-enhanced anapole resonator
AU - Xu, Lei
AU - Rahmani, Mohsen
AU - Zangeneh Kamali, Khosro
AU - Lamprianidis, Aristeidis
AU - Ghirardini, Lavinia
AU - Sautter, Jürgen
AU - Camacho-Morales, Rocio
AU - Chen, Haitao
AU - Parry, Matthew
AU - Staude, Isabelle
AU - Zhang, Guoquan
AU - Neshev, Dragomir
AU - Miroshnichenko, Andrey E.
N1 - Publisher Copyright:
© 2018, The Author(s).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - We demonstrate that a dielectric anapole resonator on a metallic mirror can enhance the third harmonic emission by two orders of magnitude compared to a typical anapole resonator on an insulator substrate. By employing a gold mirror under a silicon nanodisk, we introduce a novel characteristic of the anapole mode through the spatial overlap of resonantly excited Cartesian electric and toroidal dipole modes. This is a remarkable improvement on the early demonstrations of the anapole mode in which the electric and toroidal modes interfere off-resonantly. Therefore, our system produces a significant near-field enhancement, facilitating the nonlinear process. Moreover, the mirror surface boosts the nonlinear emission via the free-charge oscillations within the interface, equivalent to producing a mirror image of the nonlinear source and the pump beneath the interface. We found that these improvements result in an extremely high experimentally obtained efficiency of 0.01%.
AB - We demonstrate that a dielectric anapole resonator on a metallic mirror can enhance the third harmonic emission by two orders of magnitude compared to a typical anapole resonator on an insulator substrate. By employing a gold mirror under a silicon nanodisk, we introduce a novel characteristic of the anapole mode through the spatial overlap of resonantly excited Cartesian electric and toroidal dipole modes. This is a remarkable improvement on the early demonstrations of the anapole mode in which the electric and toroidal modes interfere off-resonantly. Therefore, our system produces a significant near-field enhancement, facilitating the nonlinear process. Moreover, the mirror surface boosts the nonlinear emission via the free-charge oscillations within the interface, equivalent to producing a mirror image of the nonlinear source and the pump beneath the interface. We found that these improvements result in an extremely high experimentally obtained efficiency of 0.01%.
UR - http://www.scopus.com/inward/record.url?scp=85050631335&partnerID=8YFLogxK
U2 - 10.1038/s41377-018-0051-8
DO - 10.1038/s41377-018-0051-8
M3 - Article
SN - 2047-7538
VL - 7
JO - Light: Science and Applications
JF - Light: Science and Applications
IS - 1
M1 - 44
ER -