Abstract

A nanoantenna that consists of a pair of perpendicular diabolo metal elements with a common central junction is proposed for creating magnetic field enhancement. It is shown that such a nanoantenna can generate a single magnetic hot spot for any polarization state in near-infrared frequency range, strongly confining and enhancing magnetic field under less restrained conditions. The magnetic spectral response of the nanoantenna can be tailored as will by altering its geometric parameters. Moreover, this cross-diabolo nanoantenna can preserve the polarization character of any in-plane dipole in the far-field patterns with high fidelity.

© 2011 IEEE

Complementary bowtie aperture for localizing and enhancing optical magnetic field

Nan Zhou, Edward C. Kinzel, and Xianfan Xu
Opt. Lett. 36(15) 2764-2766 (2011)

Optical magnetic field enhancement at nanoscale: a nanoantenna comparative study

Mahsa Darvishzadeh-Varcheie, Mohammad Kamandi, Mohammad Albooyeh, and Filippo Capolino
Opt. Lett. 44(20) 4957-4960 (2019)

Enhanced optical absorption and electric field resonance in diabolo metal bar optical antennas

Zeyu Pan and Junpeng Guo
Opt. Express 21(26) 32491-32500 (2013)

Switchable metamaterial for enhancing and localizing electromagnetic field at terahertz band

Junxing Liu, Kailin Zhang, Xiankuan Liu, Zeyu Zhang, Zuanming Jin, Xiaoyong He, and Guohong Ma
Opt. Express 25(13) 13944-13952 (2017)

Impact of local-field effects on the plasmonic enhancement of vibrational signals by infrared nanoantennas

Y. L. A. Rezus and O. Selig
Opt. Express 24(11) 12202-12227 (2016)