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SUMMARY:IEM Distinguished Lecturers Seminar: Shaping electromagnetic waves
  with tunable metasurface: from physics to products
DTSTART:20230505T131500
DTEND:20230505T140000
DTSTAMP:20260510T230036Z
UID:7960e8b5798818b1fb518be1c5c4aa97759db97dd08db778108da43a
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Geoffroy Lerosey\, Greenerwave\, co-founder\, CEO/CSO\nThe 
 seminar will take place in ELA 2 and will be simultaneously broadcasted i
 n the main auditorium in Neuchâtel Campus (MC A1 272).\n\nCoffee and coo
 kies will be served at 13:00 before the seminar\, in front of the two audi
 toriums. \n\nAbstract\nIn this talk I will show how\, starting from the f
 ield of waves in complex media in acoustics and RF\, we learned how to con
 trol the propagation of light through very scattering media using smart re
 configurable reflectors\, namely spatial light modulators.\nI will explain
  how this has led us\, almost 10 years ago\, to propose to use tunable met
 asurfaces as smart reflectors to enhance wireless communications. I will s
 how the first results obtained and published in 2014\, that proved how a s
 mall tunable metasurface placed in an office room can multiply by 10 the e
 nergy transmitted between 2 antennas. I will propose a basic application t
 o wireless communications in the context of WIFI\, obtained by the startup
  Greenerwave years ago\, thus showing the first use of a Reconfigurable In
 telligent Surface (RIS) in a communication system.\nThen\, I will underlin
 e how defining a concept in a lab is very different from designing a produ
 ct and explain how difficult it was for us to bring these ideas to the mar
 ket. This will lead me to detail how we have pivoted the company 2 years a
 fter creation\, to develop more timely products based on the same core tec
 hnology of reconfigurable metasurfaces and physics-based algorithms to con
 trol them. I will underline this pivot with two main applications\, the fi
 rst one in the very low frequency range of RFID\, and the second one in th
 e higher one of millimeter wave\, with our unique design of electronically
  steerable antennas for Satcom and 5G applications.\nFinally I will make a
  brief overview of our current developments in the RIS domain\, with the f
 irst RIS aided wireless communications realized in the mmWave range\, demo
 nstrating non line of sight mmWave data transmission using low complexity 
 and low consumption tunable metasurfaces.\n\nBio\nGeoffroy Lerosey is the 
 co-founder and the inventor of the concepts behind Greenerwave with Mathia
 s Fink. He is on leave from academia to fully support the company’s deve
 lopment and bring his scientific expertise as CEO and CSO. Geoffroy earned
  an engineering degree from ESPCI Paris\, a Master’s degree in electroni
 cs from Université Pierre et Marie Curie and a PhD in Physics from Univer
 sité Paris Diderot. He joined University of California at Berkeley for Po
 stdoctoral research working mainly on metamaterials and plasmonics. Coming
  back to France\, Geoffroy was appointed by French main academic research 
 organization CNRS in 2008 and started a group at Institut Langevin (CNRS &
  ESPCI Paris). Geoffroy’s research are in metamaterials and metasurfaces
 \, time reversal and signal processing\, subwavelength imaging and focusin
 g techniques\, wavefront shaping in optics and RF\, photonic and phononic 
 crystals\, reverberating and locally resonant media\, and span many domain
 s of wave physics from acoustics to optics. Geoffroy has been invited more
  than 100 times at international conferences and has given invited seminar
 s in many universities worldwide. His research led to 120 scientific artic
 les\, 25 patents and 2 startups.\n\n 
LOCATION:ELA 2 https://plan.epfl.ch/?room==ELA%202 https://epfl.zoom.us/j/
 63596420243
STATUS:CONFIRMED
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