BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Australia/Sydney BEGIN:DAYLIGHT DTSTART:20251005T030000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=10 TZNAME:AEDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20260405T020000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 TZNAME:AEST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20251115T021935Z UID:F75BEF66-FA87-4685-8846-19155F5B4414 DTSTART;TZID=Australia/Sydney:20251107T120000 DTEND;TZID=Australia/Sydney:20251107T133000 DESCRIPTION:Abstract[]\n\nMetasurfaces are planar analogues of metamaterial s\, they are artificially engineered media composed of subwavelength struc tural elements. Their constituent meta-atoms\, through carefully tailored geometry\, arrangement\, and collective interactions\, enable precise cont rol of electromagnetic waves and give rise to properties not found in natu ral materials. The dynamic tuning of metamaterials has become a rapidly gr owing area of research\, holding promise as the next breakthrough in their evolution. Dynamic metasurfaces\, whose properties vary in time\, are oft en referred to as time-varying or parametric metasurfaces. They offer uniq ue opportunities to overcome fundamental limitations in electromagnetics a nd to realise effects unattainable with conventional materials\, such as m agnetic-field-free nonreciprocity. With sufficiently high modulation speed s\, complete control of light in both space and time becomes achievable.\n \nIn this talk\, I will present my research on dynamic metasurfaces\, focu sing on recent theoretical and experimental advances in parametric metasur faces based on split-ring resonators integrated with varactor diodes. Thes e metasurfaces exhibit amplification and frequency upconversion in the mic rowave range\, offering a promising pathway toward high-frequency applicat ions enabled by ultrafast modulation. I will also highlight the potential of tunable metasurfaces utilising phase-change materials such as vanadium dioxide and micro-electro-mechanical systems for applications including te rahertz bolometric detection\, modulators\, and spectrally tunable band-pa ss filters for infrared imaging and sensing. Finally\, I will briefly disc uss the use of metasurface filters in biomedical fibre-optic imaging.\n\nS peaker(s): Fedor Kovalev\, \n\nBldg: Building 11\, University of Technolog y Sydney\, Room CB11.06.408\, Sydney - Ultimo\, New South Wales\, Australi a\, 2007 LOCATION:Bldg: Building 11\, University of Technology Sydney\, Room CB11.06 .408\, Sydney - Ultimo\, New South Wales\, Australia\, 2007 ORGANIZER:shaghayegh.chamani@student.uts.edu.au SEQUENCE:47 SUMMARY:Dynamic Metasurfaces: From Tunability to Parametric Modulation URL;VALUE=URI:https://events.vtools.ieee.org/m/509354 X-ALT-DESC:Description: <br /><p><strong><span lang="EN-GB">Abstract</span> </strong><img style="display: block\; margin-left: auto\; margin-right: au to\;" src="https://events.vtools.ieee.org/vtools_ui/media/display/4482bba2 -2f1e-4528-9297-1edc76be5fec" alt=""></p>\n<p class="MsoNormal" style="tex t-align: justify\; line-height: 115%\;"><span style="font-size: 12.0pt\; l ine-height: 115%\; font-family: 'Times New Roman'\,serif\;">Metasurfaces a re planar analogues of metamaterials\, they are artificially engineered me dia composed of subwavelength structural elements. Their constituent meta- atoms\, through carefully tailored geometry\, arrangement\, and collective interactions\, enable precise control of electromagnetic waves and give r ise to properties not found in natural materials. The dynamic tuning of me tamaterials has become a rapidly growing area of research\, holding promis e as the next breakthrough in their evolution. Dynamic metasurfaces\, whos e properties vary in time\, are often referred to as time-varying or param etric metasurfaces. They offer unique opportunities to overcome fundamenta l limitations in electromagnetics and to realise effects unattainable with conventional materials\, such as magnetic-field-free nonreciprocity. With sufficiently high modulation speeds\, complete control of light in both s pace and time becomes achievable.</span></p>\n<p class="MsoNormal" style=" text-align: justify\; line-height: 115%\;"><span style="font-size: 12.0pt\ ; line-height: 115%\; font-family: 'Times New Roman'\,serif\;">In this tal k\, I will present my research on dynamic metasurfaces\, focusing on recen t theoretical and experimental advances in parametric metasurfaces based o n split-ring resonators integrated with varactor diodes. These metasurface s exhibit amplification and frequency upconversion in the microwave range\ , offering a promising pathway toward high-frequency applications enabled by ultrafast modulation. I will also highlight the potential of tunable me tasurfaces utilising phase-change materials such as vanadium dioxide and m icro-electro-mechanical systems for applications including terahertz bolom etric detection\, modulators\, and spectrally tunable band-pass filters fo r infrared imaging and sensing. Finally\, I will briefly discuss the use o f metasurface filters in biomedical fibre-optic imaging.</span></p> END:VEVENT END:VCALENDAR