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SUMMARY:The back – gated AlGaN/GaN HEMT structure for observation of twi
 sted plasmonic states in terahertz frequency range.
DTSTART;VALUE=DATE-TIME:20220706T153500Z
DTEND;VALUE=DATE-TIME:20220706T155000Z
DTSTAMP;VALUE=DATE-TIME:20260606T193655Z
UID:indico-contribution-812@events.ncbj.gov.pl
DESCRIPTION:Speakers: Piotr Dróżdż (CENTERA Laboratories\, Institute of
  High Pressure Physics\, PAS)\nThe Inverse Faraday Effect (IFE) is the app
 earance of stationary magnetic moments magnetization caused by circulary p
 olarized ligh. Up to this moment\, IFE has been mostly studied in the magn
 etic materials. In recent years\, the IFE was predicted in the periodic la
 ttice of metallic disks or spheres placed in the vicinity of two-dimension
 al electron liquid and under illumination of the external circularly polar
 ized light. The radiation causes the DC current loops in the electron liqu
 id\, thus leading to appearance of static magnetic moments. As a result\, 
 the interaction between metal disks and two-dimensional electron liquid\, 
 the "twisted" plasmonic modes are excited what leads to the appearance of 
 DC circulating current due to rectification. In this work\, we present the
  basic idea of IFE. The mechanism of the effect is described and the theor
 etical predictions are presented. We propose GaN/AlGaN as a basic system f
 or the experimental realization of the IFE. We present GaN/AlGaN HEMT like
  structure with 2-dimensional electron gas as a channel\, that was made in
  order to observe the twisted plasmonic modes experimentally. On top of th
 e structure\, the periodic lattice of metal disks was fabricated with use 
 of electron beam lithography. We present the theoretical predictions and t
 he technological realization of the structure as well as its basic charact
 erization. The frequency of the twisted plasmonic modes is expected to be 
 in range of 0.6 - 1.2 THz thus leading to potential applications in terahe
 rtz physics and technology.\n\nhttps://events.ncbj.gov.pl/event/75/contrib
 utions/812/
LOCATION:Novotel Warszawa Centrum Róża
URL:https://events.ncbj.gov.pl/event/75/contributions/812/
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