Chiral plasmonic lens with Archimedes-spiral distributed nanoslits

Baifu Zhang; Changbao Hu; Baojie Tang; Jingjing Hao; Xuejin Zhang; Ming Sun; Jianping Ding

doi:10.1117/1.JNP.13.026008

16 May 2019 Chiral plasmonic lens with Archimedes-spiral distributed nanoslits

Baifu Zhang, Changbao Hu, Baojie Tang, Jingjing Hao, Xuejin Zhang, Ming Sun, Jianping Ding

Author Affiliations +

Journal of Nanophotonics, Vol. 13, Issue 2, 026008 (May 2019). https://doi.org/10.1117/1.JNP.13.026008

Abstract

A chiral plasmonic lens (CPL) suitable for circularly polarized light is proposed; it consists of multiple concentric grooves surrounded by two Archimedes-spiral distributed arrays of rectangular nanoslits milled into a gold film. We demonstrate both theoretically and numerically that the proposed CPL can convert an incident circular polarization beam with prescribed chirality into a long centrosymmetric focus with a size beyond the diffraction limit, but the circularly polarized one with the opposite chirality cannot be transmitted and focused by the same CPL due to the chirality of the proposed structure. Depending on the design parameters, an optical needle or optical tube in the focal field can be achieved; the attainable focus has a full-width at half-maximum of 0.43λ₀ and an elongated depth of focus of 2.95λ₀ with λ₀ denoting the wavelength of illumination light.

Citation Download Citation

Baifu Zhang, Changbao Hu, Baojie Tang, Jingjing Hao, Xuejin Zhang, Ming Sun, and Jianping Ding "Chiral plasmonic lens with Archimedes-spiral distributed nanoslits," Journal of Nanophotonics 13(2), 026008 (16 May 2019). https://doi.org/10.1117/1.JNP.13.026008

Received: 12 January 2019; Accepted: 30 April 2019; Published: 16 May 2019

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available