Two-Dimensional Digital Beam Steering Based on Liquid Crystal Phase Gratings

García de Blas, Mario and Geday, Morten Andreas and Oton Sánchez, José Manuel and Quintana Arregui, Patxi Xabier (2021). Two-Dimensional Digital Beam Steering Based on Liquid Crystal Phase Gratings. "Applied Sciences", v. 11 (n. 8); p. 3632. ISSN 2076-3417. https://doi.org/10.3390/app11083632.

Description

Title: Two-Dimensional Digital Beam Steering Based on Liquid Crystal Phase Gratings
Author/s:
  • García de Blas, Mario
  • Geday, Morten Andreas
  • Oton Sánchez, José Manuel
  • Quintana Arregui, Patxi Xabier
Item Type: Article
Journal/Publication Title: Applied Sciences
Date: 2021
ISSN: 2076-3417
Volume: 11
Subjects:
Freetext Keywords: Beam steering; liquid crystal; blaze grating; direct laser witting
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (717kB) | Preview

Abstract

Electrically tunable phase gratings are able to steer an incoming light beam without employing movable parts. Here, we present the design and implementation of a 2D beam steering device by cascading two orthogonal 1D liquid crystal (LC) based phase gratings, each having an array of 72 rectangular individually controlled pixels and driven by a custom 12-bit Pulse-Width Modulation (PWM) electrical driver. High-resolution structures in glass wafers coated with transparent Indium-Tin Oxide (ITO) have been prepared using Direct Laser Writing (DLW) techniques. With DLW, a high number of pixels can easily be drawn with an interpixel space of less than 3 μm, leading to devices with a high fill factor. The active area of the cascaded device is 1.1 × 1.1 mm2. We present a 72 × 72 point efficiency map corresponding to a maximum diagonal steering angle of 1.65°. Special attention has been paid to make the device compatible with space application by avoiding electronics in the active area.

Funding Projects

TypeCodeAcronymLeaderTitle
Madrid Regional GovernmentS2018/NMT-4326SINFOTON2-CMUnspecifiedSensores e INstrumentación en tecnologías FOTÓNicas2
Government of SpainTEC2016-77242-C3-2-RUnspecifiedUnspecifiedEstructuras sub-longitud de onda de capa delgada para circuitos fotónicos (ii) guiaondas activas y chips fotónicos
Madrid Regional GovernmentIND2017/TIC-7835UnspecifiedUnspecifiedPrograma de Doctores Industriales

More information

Item ID: 67090
DC Identifier: http://oa.upm.es/67090/
OAI Identifier: oai:oa.upm.es:67090
DOI: 10.3390/app11083632
Official URL: https://www.mdpi.com/2076-3417/11/8/3632
Deposited by: Memoria Investigacion
Deposited on: 19 May 2021 16:29
Last Modified: 19 May 2021 16:29
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM