Single‐layer narrow‐band beam splitter based on a transparent grating with high‐spectral contrast and high‐angle sensitivity. (1st October 2017)

• Record Type: Journal Article
• Authors: Zhang, Jian; Zhang, Xinping
• Is Part Of: Micro & nano letters. Volume 12:Number 10(2017)
• Page Start: 767
• Page End: 771
• Publication Date: 2017-10-01
• Subjects: optical beam splitters -- diffraction gratings -- optical tuning -- indium compounds -- light reflection -- visible spectra -- thin films; single‐layer narrow‐band beam splitter -- transparent grating -- high‐spectral contrast -- high‐angle sensitivity -- polarisation beam splitter -- high‐angle‐resolved tunability -- visible spectrum -- transparent thin hlm -- one‐dimensional grating structures -- inductively coupled plasma -- light reflection -- retro‐diffraction -- waveguide resonance mode -- beam splitting ratio -- ITO; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2017.0082
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : A report on the polarisation beam splitter with high‐angle‐resolved tunability in the visible spectrum, which was achieved in a single layer of transparent thin film of indium‐tin‐oxide (ITO). One‐dimensional grating structures were etched into an ITO layer with a designed depth using inductively coupled plasma, where the remaining ITO acts as a waveguide. Enhanced reflection of light was observed when the retro‐diffraction was overlapped with the waveguide resonance mode. A beam splitting ratio of 1:1 was achieved at 532 nm at a specific incident angle. This is a stable and efficient beam splitter with high contrast and narrow‐band response. It can also be applied as tunable narrow‐band filters, angle sensors or optical switch.