Spin controlled transmission in dielectric metasurfaces (Conference Presentation)

Amr M. Shaltout; Jorik van de Groep; Yefei Wang; Mark L. Brongersma

doi:10.1117/12.2321236

17 September 2018 Spin controlled transmission in dielectric metasurfaces (Conference Presentation)

Amr M. Shaltout, Jorik van de Groep, Yefei Wang, Mark L. Brongersma

Proceedings Volume 10719, Metamaterials, Metadevices, and Metasystems 2018; 1071916 (2018) https://doi.org/10.1117/12.2321236
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Spin polarized light is commonly used to sense chiral structures, which are very recurrent in biological materials and organic compounds. Therefore, manipulating optical spin has many applications in bio-sensing, stereochemistry, and DNA structural analysis. Devices that demonstrate spin dependent optical response typically require multi-layer bianaisotropic structures or biaxial crystals. Dielectric metasurfaces can provide lighter, simpler and more efficient approach. We design and implement a silicon based metasurface that transmit only one optical spin and reflect the other. Utilizing an array of highly anisotropic rectangular silicon nano-antennas with high aspect ratio. These nano-antenna induce two kinds of optical phase-shifts which are independently controlled. One of them is the phase-shift induced by electric and magnetic Mie resonances excited inside the Silicon nano-antennas which is controlled by antennas' dimensions, while the other one is the Pancharatnam-Berry phase-shift controlled by the geometric orientations of the nano-antennas. A planar array of Si nano-antennas with different dimensions (i.e, different Mie Scattering phases), and different orientations (i.e, different geometric phases) are judiciously designed to achieve the spin based performance. The Mie phase and geometric phase coherently interact to interfere constructively for one optical spin and destructively for the other, leading to the differential optical response between opposite spins. The effect is experimentally demonstrated in the visible and NIR spectral range.

Conference Presentation

Citation Download Citation

Amr M. Shaltout, Jorik van de Groep, Yefei Wang, and Mark L. Brongersma "Spin controlled transmission in dielectric metasurfaces (Conference Presentation)", Proc. SPIE 10719, Metamaterials, Metadevices, and Metasystems 2018, 1071916 (17 September 2018); https://doi.org/10.1117/12.2321236

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

Silicon

Phase shifts

Geometrical optics

Antennas

Biosensing

Crystals

Show All Keywords

Keywords/Phrases

Search In:

Publication Years