{"id":84302,"date":"2017-12-19T08:23:17","date_gmt":"2017-12-19T06:23:17","guid":{"rendered":"https:\/\/www.technion.ac.il\/blog\/the-big-bang-of-nanophotonics\/"},"modified":"2017-12-19T08:23:17","modified_gmt":"2017-12-19T06:23:17","slug":"the-big-bang-of-nanophotonics","status":"publish","type":"post","link":"https:\/\/www.technion.ac.il\/en\/blog\/the-big-bang-of-nanophotonics\/","title":{"rendered":"The \u201cBig Bang\u201d of Nanophotonics"},"content":{"rendered":"

The prestigious scientific journal \u2018Science\u2019 announces a groundbreaking scientific discovery that demonstrates a photonic \u201cBig Bang\u201d in a Technion laboratory. <\/span><\/p>\n

Operating on a nanometric scale, the research team is led by Prof. Erez Hasman from the Technion\u2019s Faculty of Mechanical Engineering.<\/span><\/p>\n

\n

\"\"
The photonic Big Bang: Weak disorder produces weak nanometric separation between photons with opposite spins (red and blue) \u2013 \u201cthe photonic spin Hall effect.\u201d The photonic Big Bang only occurs in strong disorder \u2013 dispersal of the opposite spinning photons in every direction
known as \u201crandom Rashba effect.\u201d This phenomenon describes a transition in topological phases that is illustrated by a broken symmetry. The study was influenced by models in cosmology that depict the Big Bang. The figure shows silicone nano-antennas, and the transition from orderly antennas to strong disorder. Credit for the illustration: Ella Maru Studio<\/figcaption><\/figure>\n

The journal \u2018Science\u2019 is publishing a groundbreaking scientific discovery by a research group headed by Prof. Erez Hasman of the Technion\u2019s Faculty of Mechanical Engineering and the Russell Berrie Nanotechnology Institute (RBNI) at the Technion. The discovery demonstrates the transition from an orderly physical system to a disorderly system in optics on a nano-scale, and shows a photonic \u201cBig Bang\u201d in laboratory conditions, inspired by models in cosmology.<\/strong><\/p>\n

\u201cOur research deals with the development of nanometer scale optical devices and with understanding the interaction between light and tiny structures,\u201d explains Prof. Hasman, head of the nano-optics labs. \u201cThe aim of the current study – that was published yesterday in the journal \u2018Science\u2019 and which was inspired by the \u2018Big Bang\u2019 model in cosmology – was to investigate the optical transition from an orderly to a disorderly structure. We tried to understand the mechanism of the topological phase transition (from an orderly to an extremely disorderly state as a result of breaking the symmetry) on a nanometric scale.\u201d The research team includes<\/span>\u00a0graduate students Elhanan Maguid; Michael Yannai; Arkady Faerman; Igor Yulevich; and the researcher Vladimir Kleiner.<\/span><\/p>\n

\n

The nanooptics Big Bang occurs when there is increased disorder and when the system reaches a critical point where there is complete disorder, meaning dispersal of the opposite spinning photons in every direction.<\/strong><\/p>\n<\/blockquote>\n

The \u201cphotonic big bang\u201d was demonstrated using nanometric metasurfaces based on tiny silicone antennas (nano-antennas). \u201cUsing nano-antennas that we produced in the lab using silicone technology, we developed a method to control disorder in the system \u2013 increasing the entropy,\u201d elaborates Prof. Hasman. \u201cLight is composed of photons, massless particles, travelling in a speed of light. Each photon behaves like a spinning top that spins either clockwise or counter-clockwise. (In scientific terminology: positive or negative spin<\/em>).<\/span><\/p>\n

\"\"
Members of the Nanooptics group led by Prof. Hasman who are partners in the study. From right: Arkady Faerman, Michael Yannai, Prof. Erez Hasman, Dr. Vladimir Kleiner, Elhanan Maguid and Igor Yulevich.<\/figcaption><\/figure>\n

A \u2018photonic spin Hall effect\u2019 occurs when an orderly state is transformed into a state of minor disorder, meaning that the angle of the nano-antennas is slightly altered. This effect is a spatial separation between photons spinning in opposite directions; photons with positive spins move in a certain direction and others with negative spins move in the opposite direction. <\/span><\/p>\n

This is a very small separation on the nanometer scale, and therefore the researchers used an idea formulated by Prof. Yakir Aharonov from Tel Aviv University called \u2018quantum weak measurement\u2019, in order to measure the nanometric separation between the light particles\u2019 two opposite spin states. The nanooptics Big Bang occurs when there is increased disorder and when the system reaches a critical point where there is complete disorder, meaning dispersal of the opposite spinning photons in every direction (in scientific terminology, this is called \u2018the random Rashba effect\u2019<\/em>).<\/span><\/p>\n

The breakage of the system\u2019s symmetry results in the creation of optical whirlpools (vortices) known as topological defects. Optical whirlpools were created as a result of interaction between a photon orbit and its spin (in scientific terminology, this is called \u2018spin-orbit interaction\u2019). A unique phenomenon was discovered during measurement \u2013 a dramatic spatial increase in the number of optical vortices and the creation of repulsion between vortices as a result of disorder.\u201d<\/span><\/p>\n

\"\"
Strong disorder causes the random Rashba effect<\/figcaption><\/figure>\n

The global scientific breakthrough took place in Prof. Hasman\u2019s lab at the Technion, and describes the photonic \u201cBig Bang\u201d \u2013 a big bang on a nanometric scale based on light. <\/span><\/p>\n

The research provides inspiration for understanding disorder in solid states, and will impact the field of spintronics. Furthermore, it opens opportunities for designing artificial materials while controlling their level of disorder. <\/span><\/p>\n

Prof. Hasman is a world-renowned expert in nanophotonics \u2013 the interaction of light with nanometric structures. He founded the field of spinoptics and in recent years, Prof. Hasman and his research group developed multitasking nano-devices based on silicone nano-antennas, which can be used to generate light beams and combine a large number of optical components in a single nanometric element. \u00a0<\/span><\/p>\n

\"\"
Weak disorder causes the photonic spin Hall Effect<\/figcaption><\/figure>\n

Prof. Hasman is proud of his group\u2019s enormous achievements. \u201cEvery year for the past four years, we published a groundbreaking article in \u2018Science.\u2019 As a result of these achievements, Elhanan Maguid was awarded the prestigious Wolf Prize for outstanding doctoral students in 2017. My research group laid the foundations in 2001 for the field of photonic nanoscale metasurfaces, which is today considered one of the hottest fields in optics, with many labs researching this field,\u201d he states. <\/span><\/p>\n

Prof. Hasman\u2019s group includes researchers from different disciplines, including Physics and Engineering Science, who take part in basic research as well as applied research that yields many applications for the high-tech industry.\u00a0<\/span>Prof. Hasman collaborates with Stanford University in the U.S. \u2013 a partnership that has led to groundbreaking joint studies and research projects, and which enables the researchers in his group to lead studies with their colleagues in the U.S. The research is supported by the Israel Science Foundation (ISF) and the components were executed at the Technion\u2019s Zisapel nanoelectronics center (MNFU).<\/span><\/p>\n

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The prestigious scientific journal \u2018Science\u2019 announces a groundbreaking scientific discovery that demonstrates a photonic \u201cBig Bang\u201d in a Technion laboratory. Operating on a nanometric scale, the research team is led by Prof. Erez Hasman from the Technion\u2019s Faculty of Mechanical Engineering. The journal \u2018Science\u2019 is publishing a groundbreaking scientific discovery by a research group headed… Continue Reading The \u201cBig Bang\u201d of Nanophotonics<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-84302","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nThe \u201cBig Bang\u201d of Nanophotonics - \u05d4\u05d8\u05db\u05e0\u05d9\u05d5\u05df-\u05de\u05db\u05d5\u05df \u05d8\u05db\u05e0\u05d5\u05dc\u05d5\u05d2\u05d9 \u05dc\u05d9\u05e9\u05e8\u05d0\u05dc<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.technion.ac.il\/en\/blog\/the-big-bang-of-nanophotonics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The \u201cBig Bang\u201d of Nanophotonics - \u05d4\u05d8\u05db\u05e0\u05d9\u05d5\u05df-\u05de\u05db\u05d5\u05df \u05d8\u05db\u05e0\u05d5\u05dc\u05d5\u05d2\u05d9 \u05dc\u05d9\u05e9\u05e8\u05d0\u05dc\" \/>\n<meta property=\"og:description\" content=\"The prestigious scientific journal \u2018Science\u2019 announces a groundbreaking scientific discovery that demonstrates a photonic \u201cBig Bang\u201d in a Technion laboratory. 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