IJS KOLOKVIJ, četrtek, 6. 12. 2018, ob 13. uri, prof. dr. Qi-Huo Wei

[Natasa Gosevac]

Vabimo vas na 3. predavanje iz sklopa "Kolokviji na IJS" v letu 2018/19, ki
bo v četrtek, 6. decembra 2018, ob 13. uri.

 

Predavanje bo izjemoma v Kolarjevi 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. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



prof. dr. Qi-Huo Wei

Advanced Materials and Liquid Crystal Institute 

in Department of Physics, Kent State University, Kent, ZDA

 

Zasučite molekule, kakor želite

Tekoči kristali, ki jih tvorijo paličaste molekule, so prav posebna vrsta
mehke snovi z izjemno odzivnostjo na zunanje sile. Metode za nadzor
orientacije molekul so ključne tako za izdelavo kot za delovanje
tekočekristalnih naprav, ki so popolnoma spremenile naše vsakdanje
življenje. V tradicionalnih prikazalnikih je ureditev molekul na površini
substrata uniformna. V predavanju bomo predstavili novo metodo, pri kateri s
svetlobno šablono uredimo molekule v kompleksne 2D in 3D vzorce z
ločljivostjo, manjšo od 1 mikrometra. Ta pristop sloni na t.i. plazmonskih
metamaskah, s katerimi izdelamo poljubne polarizacijske vzorce in svetlobne
šablone. Predstavili bomo osnovna načela tega pristopa in vrsto zanimivih
možnosti uporabe vključno z mikrooptičnimi napravami za oblikovanje
laserskega žarka, upravljanje kaotičnega gibanja bakterij in ustvarjanje
topoloških defektov po želji.

Predavanje bo v angleščini.

Lepo vabljeni!

*****

 




We invite you to the 3rd Institute colloquium in the academic year 2018/19.
The colloquium will be held on Thursday, December 6, 2018 at 1 PM.

 

On this occasion, the lecture will be held in the Kolar 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.

 

********************************************

prof. dr. Qi-Huo Wei

Advanced Materials and Liquid Crystal Institute 

and Department of Physics, Kent State University, Kent, USA

 

Orient molecules as you wish

 

Liquid crystals consisting of rod-shaped molecules are a remarkable soft
matter with extraordinary responsivity to external stimuli. Techniques to
control molecular orientations are essential in both making and operating
liquid crystal devices that have changed our daily lives completely.
Traditional display devices are based on uniform alignments of molecules at
substrate surfaces. In this talk, we will present a new photopatterning
method for aligning molecules into complex 2D and 3D orientations with
sub-micrometer resolutions. This approach relies on so-called plasmonic
metamasks to generate designer polarization patterns and photoalignments. We
will present the basic principles behind this approach, and a number of
intriguing applications enabled by it, including micro-optical devices for
laser beam shaping, commanding chaotic motions of bacteria, and creating
topological defects with designer structures.

 

Cordially invited!

 

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