Open AccessNumerical analysis of film‐loaded silicon nanowire optical rectangular waveguide: an effective optical sensing
Author(s) -
Singh Ritu Raj,
Priye Vishnu
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.0140
Subject(s) - materials science , silicon , waveguide , silicon on insulator , silicon photonics , nanowire , optoelectronics , refractive index , photonics , substrate (aquarium) , optics , silicon nanowires , photonic integrated circuit , hybrid silicon laser , physics , oceanography , geology
Subwavelength waveguide using silicon nanowires is investigated for its compatibility with silicon‐on‐insulator platform. A layer of silicon film over SiO 2 substrate is employed to construct silicon nanowire waveguides that complies with standard 220 nm silicon height technology. The proposed structure is further investigated for its utility as an optical sensing element in photonic integrated circuits. Film‐loaded silicon nanowire optical rectangular waveguide (SNORW) allows light to be guided inside low refractive indexed gapping region with optimised dimension. Fully numerical analysis is performed using finite‐element method as evidence to support the guiding phenomena of this waveguide. Eventually, confinement factor and waveguide sensitivity is found to be linear with measurand refractive index. As a result, the purpose of this SNORW leads to an effective sensing in the new era of photonics.