Improving the transmission efficiency of plasmonic and dielectric metasurfaces (Conference Presentation)

Mohamed El Kabbash; Chunlei Guo; Jihua Zhang

doi:10.1117/12.2528330

9 September 2019 Improving the transmission efficiency of plasmonic and dielectric metasurfaces (Conference Presentation)

Mohamed El Kabbash, Chunlei Guo, Jihua Zhang

Author Affiliations +

Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 110800Z (2019) https://doi.org/10.1117/12.2528330
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Transmissive-type metasurfaces represent an ultrathin alternative to traditional optical elements, e.g., lenses and waveplates. However, transmissive-type plasmonic metasurfaces (PMs) have significantly low efficiency compared to dielectric metasurfaces and reflective type PMs particularly in the visible range. For example, the state-of-the-art geometric PMs transmission efficiency is ≤10% with extinction ratios ~ 0 dB. The low transmission efficiency is mainly due to three loss channels (i) absorption losses in metals, (ii) diffraction to undesired high-orders, and most importantly (iii) symmetric forward-backward scattering which puts a 25% theoretical limit on cross-polarization conversion for ultrathin metasurfaces. We use tunable, multipole-interference-based meta-atoms to address all loss channels simultaneously. The experimentally demonstrated transmission efficiency and extinction ratio of our geometric PM are 42.3% and 7.8dB, respectively. As for dielectric metasurfaces, we demonstrate a new class of metasurfaces where the meta-atoms consist of a simple anti-reflective coating (ARC). ARCs enable the control over the entire 2 pi phase range by varying the dielectric films thicknesses while realizing ~ 99% transmission efficiency even in the visible range. The metasurface consists of patches of ARC meta-atoms with dielectric optical thicknesses much lower than that required in Fresnel optics to control the entire phase range.

Conference Presentation

Citation Download Citation

Mohamed El Kabbash, Chunlei Guo, and Jihua Zhang "Improving the transmission efficiency of plasmonic and dielectric metasurfaces (Conference Presentation)", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110800Z (9 September 2019); https://doi.org/10.1117/12.2528330

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
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Dielectrics

Plasmonics

Absorption

Diffraction

Lenses

Metals

Optical components

Show All Keywords

Keywords/Phrases

Search In:

Publication Years