Optical properties of metamaterial split ring nematic colloids

Pusovnik, Anja (avtor), Aplinc, Jure (avtor), Ravnik, Miha (avtor)

The fabrication of 3D bulk metamaterials, optical materials with sub-wavelength building blocks, is an open challenge, along with the tuning of their optical properties, such as transmissivity or exit polarization where a possible approach is to embed liquid crystalline materials into metamaterials and use their tunable birefringence. In this work, we explore using numerical modelling the photonic properties of a composite of split ring resonator colloidal particles, dispersed in nematic liquid crystal, which was optimised to enable self-assembly fully. Specifcally, using generalised FDTD simulations for light propagation in birefringent profles, we demonstrate the photonic response of single particles, 2D and 3D colloidal crystals. The material transmittance is shown to exhibit clear resonant behaviour with the resonances tunable with the birefringence in the order of ~5%. Electric and magnetic feld modes emergent on the particles are shown, as afected by the surrounding nematic birefringence, both the in the slit region of the split ring resonator (SRR) particles as well as around the particles. Observed photonic response is further explained by introducing basic equivalent LC circuits. Finally, this work is aimed at developing soft and fuid metamaterials, which exhibit optical anisotropy in the photonic response as a potent mechanism for controlling the fow of light at wavelength and even sub-wavelength scales.

• Jezik: Angleški jezik
• Ključne besede: nematic colloids, colloidal crystals, optical properties, photonics, metamaterials
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2019
• Št. strani: 10 str.
• Številčenje: Vol. 9, art. 7025
• PID: 20.500.12556/RUL-128546
• UDK: 535
• ISSN pri članku: 2045-2322
• DOI: 10.1038/s41598-019-43470-6
• COBISS.SI-ID: 3307876
• Datum objave v RUL: 19.07.2021

Gradivo je del revije

• Naslov: Scientific reports
• Skrajšan naslov: Sci. rep.
• Založnik: Nature Publishing Group
• ISSN: 2045-2322
• COBISS.SI-ID: 18727432

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 07.05.2019

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nematski koloidi, koloidni kristali, optične lastnosti, fotonika, metamateriali