Optically transparent microwave polarizer based on quasi-metallic graphene

Patent metadata

Field	Value
Publication number	US-10355348-B2
Application number	US-201715717391-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Sep 30, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

An optically transparent graphene-based wire-grid polarizer for operating at microwave frequencies (X band) has a glass substrate having multiple strips or layers of SOCl 2 doped graphene. The strips are separated by portions of the glass substrate such that the strips are arranged in parallel. The SOCl 2 doped graphene strips have a quasi-metallic quality allowing for the transmission of an electric field with horizontal polarization in the horizontal direction while reflecting the vertical portion of the electric field.

First claim

What is claimed is:

1. A microwave polarizer, comprising:
a glass substrate;
a plurality of SOCl 2 doped graphene layers, and wherein:
said plurality of SOCl 2 doped graphene layers is arranged on the top of said glass substrate so as to form a sheet and are separated by portions of said glass substrate such that said plurality of SOCl 2 doped graphene layers are in parallel with one another; and
wherein each layer of said plurality of SOCl 2 doped graphene layers is about 1 nm thick, said plurality of SoCl 2 doped graphene layers comprises at least four SOCl 2 doped graphene layers, and each layer of said plurality of SOCl 2 doped graphene layers has a hole concentration greater than 10 12 cm −2 .

2. A microwave polarizer according to claim 1 , wherein:
the sheet formed by said plurality of SoCl 2 doped graphene layers and said glass substrate has a sheet resistance R s range between 10 Ω/sq and 2 kΩ/sq.

3. A microwave polarizer according to claim 1 , wherein:
said plurality of SoCl 2 doped graphene layers have a quasi-metallic quality allowing for the transmission of an electric field with horizontal polarization in the horizontal direction while reflecting a vertical electric field.

Assignees

• Us Army

Inventors

• Grande Marco
• Bianco Giusseppe V
• Vincenti Maria Antonietta
• De Ceglia Domenico
• Capezzuto Pio
• Scalora Michael
• D'Orazio Antonella
• Bruno Giovanni

Classifications

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• H01Q15/24

  Polarising devices; Polarisation filters  (H01Q15/12, H01Q15/22 take precedence) · CPC title

• H01Q1/368 Primary

  using carbon or carbon composite · CPC title

• H01Q15/22

  functioning also as polarisation filter · CPC title

• Y10S977/952

  Display · CPC title