Dnevi Jožefa Stefana, DANES IZJEMOMA ob 11:00, področje FIZIKE, prof. dr. Igor Muševič

[Martin Klanjsek]

Vabimo vas na 2. znanstveno predavanje, in sicer s področja fizike, v okviru letošnjih Dnevov Jožefa Stefana, ki bo danes, 24. marca 2026, IZJEMOMA ob 11:00 v Veliki predavalnici Instituta »Jožef Stefan« na Jamovi cesti 39 v Ljubljani. Predavanje bo v slovenščini. Na voljo bodo kava, pijača in prigrizki.

 

 

Kako usmerjati svetlobo s pomočjo svetlobe?

 

prof. dr. Igor Muševič

Institut »Jožef Stefan«, Ljubljana, Slovenija

 

 

Naš planet je prepreden z gostim omrežjem optičnih vlaken, po katerih se vsako sekundo s svetlobno hitrostjo prenesejo ogromne količine informacij. Te informacije potujejo kot izjemno kratki laserski bliski do podatkovnih centrov, kjer se pretvorijo v električne sunke, ti se shranijo, obdelajo, pretvorijo nazaj v svetlobne signale, ki nato po optičnem omrežju nadaljujejo pot do uporabnikov spleta. Ker naraščajoča količina podatkov, ki se pretaka po spletu, povzroča izjemno hitro naraščajočo porabo električne energije v podatkovnih centrih za pretvorbo iz svetlobe v elektriko in nazaj, znanost išče načine, kako bi v podatkovnih centrih in računalnikih namesto elektrike uporabili zgolj svetlobo. Z drugimi besedami, kako preusmerjati svetlobo s pomočjo svetlobe in kako s pomočjo svetlobe računati. V zadnjem desetletju se je v ta namen razvilo prodorno področje silicijeve fotonske tehnologije, ki se uspešno povezuje s sodobno mikroelektronsko tehnologijo. V predavanju bom predstavil poti in stranpoti nekonvencionalnega pristopa, v katerem smo izkoristili samoorganizacijske lastnosti mehke snovi in tekočih kristalov, da bi svetlobo usmerjali kar s pomočjo svetlobe.

 

O predavatelju: Igor Muševič je znanstveni svetnik na Institutu »Jožef Stefan« in redni profesor na Fakulteti za matematiko in fiziko Univerze v Ljubljani. V preteklosti je bil predsednik znanstvenega sveta in član upravnega odbora Instituta »Jožef Stefan« ter vodja Odseka za fiziko trdne snovi. Leta 2019 je prejel prestižni projekt ERC za uveljavljene raziskovalce, leta 2024 pa Blinčevo nagrado za življenjsko delo.

 

 

Napovednik predavanja in posnetke preteklih predavanj najdete na spletni strani »Kolokvijev na IJS«  <https://kolokviji.ijs.si/> https://kolokviji.ijs.si/, posnetke pa tudi posebej na  <https://video.arnes.si/?q=Kolokviji_IJS> https://video.arnes.si/?q=Kolokviji_IJS (zadnje štiri sezone) in  <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs (starejši).

 

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We invite you to the 2nd scientific lecture, dedicated to the field of physics, as part of this year's Jožef Stefan Days. The lecture will take place today, 24 March 2026, EXCEPTIONALLY at 11:00 AM in the main lecture hall of the Jožef Stefan Institute, Jamova cesta 39 in Ljubljana. The lecture will be held in Slovenian. Coffee, drinks, and snacks will be provided.

 

 

Controlling light with light 

 

Prof. Dr. Igor Muševič

Jožef Stefan Institute, Ljubljana, Slovenia

 

 

Our planet is crisscrossed with optical fibres that carry enormous amounts of information every second at the speed of light. These data travel as extremely short laser pulses to data centres, where they are converted into electrical signals, stored, processed, and then transformed back into light signals that continue their journey through the optical network to internet users. Because the ever growing volume of data flowing across the web is driving a rapid increase in electricity consumption in data centres – primarily for converting light into electricity and back again – scientists are searching for ways to replace electricity with light inside data centres and computers. In other words: how can we redirect light using light itself, and how can we compute using light? Over the past decade, this challenge has given rise to the rapidly advancing field of silicon photonics, which integrates seamlessly with modern microelectronics. In the lecture, I will present the paths and pitfalls of a more unconventional approach, in which we harness the self organising properties of soft matter and liquid crystals to steer light with light.

 

About the lecturer: Igor Muševič is a scientific councilor at the Jožef Stefan Institute and a full professor at the Faculty of Mathematics and Physics, University of Ljubljana. In the past, he served as the president of the Scientific Council and as a member of the Board of Governors of the Jožef Stefan Institute, as well as the head of the Condensed Matter Physics Department. In 2019 he received a prestigious ERC Advanced Grant, and in 2024 he was awarded the Blinc Lifetime Achievement Award.

 

 

The lecture trailer and recordings of past lectures can be found on the website of »JSI colloquia«  <https://kolokviji.ijs.si/> https://kolokviji.ijs.si/, and recordings specifically at  <https://video.arnes.si/en/?q=Kolokviji_IJS> https://video.arnes.si/en/?q=Kolokviji_IJS (last four seasons) and  <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs (older).

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