Optimized holographic imaging with the MIM-based metasurface

Chuan Shen; Rulin Xu; Haixiu Yu; Jiaqi Fang; Sui Wei

doi:10.1117/12.2537767

18 November 2019 Optimized holographic imaging with the MIM-based metasurface

Chuan Shen, Rulin Xu, Haixiu Yu, Jiaqi Fang, Sui Wei

Proceedings Volume 11188, Holography, Diffractive Optics, and Applications IX; 1118823 (2019) https://doi.org/10.1117/12.2537767
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

Metasurfaces, a type of metamaterials with ultrathin thickness, have drawn tremendous attention in recent years due to their extraordinary flexibility to manipulate the light at subwavelength scale. It is useful in implementing various optical functions with a set of elements. A typical application of the metasurface is the holographic imaging, and one key parameter for the realization of holographic imaging is its optical efficiency. In this paper, we demonstrate the optimized holographic imaging by using the metasurface coded with a combined phase distribution. Firstly, the phase hologram is generated by Gerchberg-Saxton (GS) algorithm and the blazed grating is formed by introducing a periodic linear phasegradient distribution. Then the phase profile of the hologram is superimposed with the phase of blazed grating to generate a new phase distribution. Benefiting from the advantage of high efficiency for the desired light-manipulation, the metasurface based on the metal-insulator-metal (MIM) structure with different geometric parameters was utilized to cover the phase shift of 0 to 2π for encoding the generated phase distribution. The structure consists of a four-level quantized metallic Au nanorods elements separated by dielectric layers of SiO2 with the Au substrate, so a macro cell of our metasurface consists of 16 (=4× 4) subwavelength meta-atom, which are made of the Au nanorods with different width. The simulated far-filed patterns are calculated by finite-difference time-domain (FDTD) method. Compared to previous metasurface, our structure preferentially steer incident energy into the desired first order diffracted beam with the help of the equivalent of the blazed grating. And the optimized holographic imaging results could be achieved.

Citation Download Citation

Chuan Shen, Rulin Xu, Haixiu Yu, Jiaqi Fang, and Sui Wei "Optimized holographic imaging with the MIM-based metasurface", Proc. SPIE 11188, Holography, Diffractive Optics, and Applications IX, 1118823 (18 November 2019); https://doi.org/10.1117/12.2537767

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Holography

Gold

Finite-difference time-domain method

Holograms

Nanorods

Computer programming

Dielectrics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years