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Photonic properties of heliconical liquid crystals
ID Pusovnik, Anja (Author), ID Štimulak, Mitja (Author), ID Ravnik, Miha (Author)

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Abstract
Periodic birefringence is today extensively explored as an interesting route for controlling the flow of light. Distinctly, complex fluids with periodic modulations of birefringence can perform as photonic crystals, with the main examples being cholesteric and blue phases birefringent profiles. Here we demonstrate the characteristics of light propagation in heliconical liquid crystal and demonstrate their tunable optical and photonic properties, specifically as onedimensional photonic crystals, in the regime of heliconical pitch comparable to the wavelength of light. Using a combination of frequency- and time-domain simulations, we show the existence and properties of the photonic band gap, as determined by the relative handedness of the polarization of light and the heliconical structure. We calculate photonic eigenmodes of the light and find the emergence of electric field component along the propagation axis of light, for both left- and right-handed polarization of light, which in turn results in strongly spatially varying Poynting vector that exhibits circular-like and four-leaf-clover-like patterns. As this variation of the Poynting vector is tunable with various material parameters and external (electric) fields, heliconical birefringence photonic crystals show interesting potential for use in tunable photonic applications, such as complex modulation of light beams.

Language:English
Keywords:optics, photonics, liquid crystals
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Version of Record
Year:2018
Number of pages:Str. 23265-23277
Numbering:Vol. 26, no. 18, art. 335156
PID:20.500.12556/RUL-128572 This link opens in a new window
UDC:535.5
ISSN on article:1094-4087
DOI:10.1364/OE.26.023265 This link opens in a new window
COBISS.SI-ID:3232100 This link opens in a new window
Copyright:
V članku navedeno: "© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement"; s povezavo https://www.osapublishing.org/library/license_v1.cfm. (20. 7. 2021)
Publication date in RUL:20.07.2021
Views:964
Downloads:231
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Record is a part of a journal

Title:Optics express
Shortened title:Opt. express
Publisher:Optica
ISSN:1094-4087
COBISS.SI-ID:8636438 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:optika, fotonika, tekoči kristali

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P1-0099
Name:Fizika mehkih snovi, površin in nanostruktur

Funder:ARRS - Slovenian Research Agency
Project number:J1-7300
Name:Metamateriali na osnovi tekočekristalnih koloidov

Funder:ARRS - Slovenian Research Agency
Project number:L1-8135
Name:Biološka zdravila: detektor tvorbe proteinskih delcev na osnovi tekočih kristalov

Funder:Other - Other funder or multiple funders
Funding programme:USAF AFRL EOARD
Project number:FA9550-15-1-0418
Name:Nematic Colloidal Tilings as Tunable Soft Metamaterials

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