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Complex field-induced nematic defect structures in Laguerre-Gaussian optical tweezers : invited paper
Žumer, Slobodan (Avtor), Porenta, Tine (Avtor), Ravnik, Miha (Avtor)

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Izvleček
Complex optical field-induced defect structures are presented in nematic and chiral nematic liquid crystals, as imprinted by Laguerre-Gaussian (LG) laser beams. Our modeling study is based on the phenomenological free energy approach, which dielectrically couples the nematic optical axis with the polarization of the LG beams. The symmetry of the presented structures proves to be conditioned by the beam helical indices. The beam intensity, strength of the nematic elastic constant, and local intensity-induced control of the nematic order via absorption of the light are demonstrated as possible mechanisms for producing, imprinting, and tuning of the field-induced complex defect structures in achiral and chiral nematics.

Jezik:Angleški jezik
Ključne besede:liquid crystals, colloids, laser tweezers, Laguerre-Gaussian beam, nematic defect structure, optical imprinting
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.06 - Objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)
Organizacija:FMF - Fakulteta za matematiko in fiziko
Leto izida:2012
Št. strani:7 str.
UDK:544.25
DOI:10.1117/12.930450 Povezava se odpre v novem oknu
COBISS.SI-ID:2506084 Povezava se odpre v novem oknu
Število ogledov:778
Število prenosov:218
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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