Abstract

To construct a dielectric analog of a spaser, we study several configurations of cluster-based unit cells for an all-dielectric metasurface characterized by resonant conditions of the trapped mode excitation. Excitation of the trapped mode is realized by performing either specific displacement of particles in the cluster or perturbation of the equidistantly spaced particles by off-centered holes. The latter approach is more advantageous for enhancement of the electric near-field with homogeneous distribution in-plane of the structure and strong field localization outside the high-refractive-index dielectric particles. This feature opens prospects for realization of subwavelength flat lasing structures based on strong near-field interaction with substances exhibiting nonlinear characteristics and properties of gain media.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Dual-toroidal dipole excitation on permittivity-asymmetric dielectric metasurfaces

Xingguang Liu, Junqing Li, Qiang Zhang, and Yixiao Wang
Opt. Lett. 45(10) 2826-2829 (2020)

One-way and near-absolute polarization insensitive near-perfect absorption by using an all-dielectric metasurface

Deniz Umut Yildirim, Amir Ghobadi, Mahmut Can Soydan, Andriy E. Serebryannikov, and Ekmel Ozbay
Opt. Lett. 45(7) 2010-2013 (2020)

Dynamic beam splitter employing an all-dielectric metasurface based on an elastic substrate

Hasan Kocer, Yılmaz Durna, Hamza Kurt, and Ekmel Ozbay
Opt. Lett. 45(13) 3521-3524 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription