Mechanical manipulation of diffractive properties of optical holographic gratings from liquid crystalline elastomers

Bošnjaković, Dejan (avtor), Gregorc, Marko (avtor), Li, Hui (avtor), Čopič, Martin (avtor), Domenici, Valentina (avtor), Drevenšek Olenik, Irena (avtor)

An appealing property of optical diffractive structures from elastomeric materials is a possibility to regulate their optical patterns and consequently also their diffractive features with mechanical straining. We investigated the effect of strain on diffraction characteristics of holographic gratings recorded in a monodomain side-chain liquid crystalline elastomer. The strain was imposed either parallel or perpendicular to the initial alignment direction of the material. At temperatures far below the nematic–paranematic phase transition, straining along the initial alignment affects mainly the diffraction pattern, while the diffraction efficiency remains almost constant. In contrast, at temperatures close to the nematic–paranematic phase transition, the diffraction efficiency is also significantly affected. Straining in the direction perpendicular to the initial alignment strongly and diversely influences both the diffraction pattern and the diffraction efficiency. The difference between the two cases is attributed to shear–stripe domains, which form only during straining perpendicular to the initial alignment and cause optical diffraction that competes with the diffraction from the holographic grating structure.

• Jezik: Angleški jezik
• Ključne besede: optics, diffraction, holographic gratings, liquid crystalline elastomers, optical diffraction, elasto-optic effect
• 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: 2018
• Št. strani: 13 str.
• Številčenje: Vol. 8, iss. 8, art. 1330
• PID: 20.500.12556/RUL-131639
• UDK: 535
• ISSN pri članku: 2076-3417
• DOI: 10.3390/app8081330
• COBISS.SI-ID: 3224420
• Datum objave v RUL: 30.09.2021

Gradivo je del revije

• Naslov: Applied sciences
• Skrajšan naslov: Appl. sci.
• Založnik: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

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: 09.08.2018

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: optika, uklon, holografske mrežice, tekočekristalni elastomeri

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0192
• Naslov: Svetloba in snov