IJS KOLOKVIJ, četrtek, 22. 3. 2018, ob 13. uri; prof. Slobodan Žumer

[Tanja Debevec]

Vabimo vas na 12. predavanje iz sklopa "Kolokviji na IJS" v letu 2017/18, ki bo v četrtek, 22. marca 2018, ob 13. uri v Veliki predavalnici Instituta »Jožef Stefan«  na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

Predavanja si lahko ogledate tudi na spletni televiziji IJS: https://video.arnes.si/portal/asset.zul?id=a2aIAUgdtfO8N3i6fkrIBRWV

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prof. Slobodan Žumer 

Univerza v Ljubljani in Institut Jožef Stefan, Ljubljana, Slovenija 

 

Frustrirana tekoče kristalna urejenost kot ključ do topološke mehke snovi

 

Za topološko mehko snov so značilni stabilni defekti v njeni orientacijski urejenosti. Kompleksnost defektnih struktur in njihova stabilnost temeljita na frustraciji, ki je pogojena s konfliktnostjo vplivov kiralnosti, anizotropne elastičnosti, ograjenosti in zunanjih polj. Pokazali bomo, kako enostavni tekoči kristali, kot so nematiki, kolesteriki in modre faze, tvorijo "topološko igrišče", kjer s kontrolirano frustracijo lahko stabiliziramo točkovne in linijske singularne defekte ter nesingularne solitonske strukture, kot so npr. skirmioni. Nasprotno od dobro poznane rabe tekočih kristalov v prikazalnikih, kjer so defekti moteč element, topološka mehka snov odpira nove možnosti za rabo v fotoniki, plazmoniki in senzoriki.

Lepo vabljeni!

 

 




We invite you to the 12th Institute colloquium in the academic year 2016/17. The colloquium will be held on Thursday, March 22, 2018 at 1 PM in the main Institute lecture hall, Jamova 39, Ljubljana. To read the abstract click  http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on  http://videolectures.net/kolokviji_ijs.

Lectures can also be viewed on the IJS Web TV: https://video.arnes.si/portal/asset.zul?id=a2aIAUgdtfO8N3i6fkrIBRWV

 

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prof. Slobodan Žumer 

University of Ljubljana and Jožef Stefan Institute, Ljubljana, Slovenia 

 

Frustrated liquid-crystalline ordering as a key to topological soft matter

 

Topological soft matter is characterized by stable defects in its orientational ordering. The complexity and stability of defect structures depend on the frustration caused by conflicting effects of chirality, anisotropic elasticity, confinement, and external fields. We will show how simple liquid crystals like nematic, cholesteric, and blue phases form a "topological playground" where, by controlled frustration, we can stabilize point & line singular defects, and non-singular solitonic structures like skyrmions. In contrast to the well-known use of liquid crystals in displays, where defects are undesired objects, topological soft matter opens up new possibilities for applications in photonics, plasmonics, and sensorics.

 

Cordially invited!                     

 

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