BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT DTSTART:20240310T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20241103T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20240703T154257Z UID:A49A151B-816E-44CD-8608-47FFB37A00D1 DTSTART;TZID=America/New_York:20240610T130000 DTEND;TZID=America/New_York:20240610T161500 DESCRIPTION:The tutorial will take place in Davis Hall 101 at UB North Camp us or on Zoom link below.\n\nTutorial Session\, Chair: Vladimir Mitin\n\nS essions and presenters are:\n\n1:00 pm – 2:00 pm\nTutorial – 1\n\nMich ael Shur\, Rensselaer Polytechnic Institute\n\nCounterintuitive Physics of Terahertz Electronics.\n\nAbstract: In typical electronic layers formed a t semiconductor heterointerfaces\, electron-electron collisions are so fre quent that electrons form a two-dimensional viscous electronic fluid. (Thi s is contrary to a popular belief that they form a two-dimensional electro n gas.) The viscosity of this fluid in graphene at cryogenic temperatures is hundreds of times higher than the viscosity of honey. In conventional s emiconductors at room temperature\, viscosity is similar to glycerin visco sity – still very important\, but not necessarily dominant. The electron transport in electronic (or hole) fluid was collision-dominated in most o f the last century field effect transistors operating at room temperature. It is collision-dominated in modern Thin Film Transistors\, but in more a dvanced transistors (such as MOSFETs used in iPhone 15 pro) the electron t ransport is ballistic or quasi-ballistic. Ballistic or quasi-ballistic ele ctronic fluid supports the waves of electron density - called plasma waves that could resonate with impinging terahertz (THz) radiation and become u nstable (amplifying or even generating THz radiation). At high intensities of impinging THz radiation\, plasma waves get transformed into shock wave s. Even more interesting is the physics of “plasmonic crystals” combin ing properties of a fluid and crystal. I will discuss “plasmonic boom” instabilities\, the instabilities controlled by boundary conditions\, and transit time instabilities in plasmonic crystals. These instabilities pro vide the mechanisms for generating sub-THz and THz radiation for 6G commun ications and multiple other applications of THz electronics. I will also p resent predictions and the first measured data on Tesla-range DC magnetic fields generated in circular plasmonic crystals by circularly polarized TH z radiation\, and explain recently observed switching from decay to transp arency to amplification in graphene plasmonic crystals.\n\n2:00 pm – 3:0 0 pm\nTutorial – 2\n\nTaiichi Otsuji\, Tohoku University\n\nPlasmonic Te rahertz Devices Using Graphene-Based 2D Materials\n\nAbstract: Graphene ha s attracted considerable attention due to its massless and gapless energy spectrum. This lecture reviews recent advances in the research of plasmoni c terahertz (THz) devices using graphene-based two-dimensional (2D) materi als\, particularly highlighting the THz sources and detectors for use in f uture 6G/7G THz wireless communications systems. Carrier-injection pumping of graphene can enable negative-dynamic conductivity in the terahertz (TH z) range leading to new types of THz lasers. We developed a prototype of a graphene channel laser transistor\, demonstrating broadband amplified spo ntaneous emission from 1 to 7.6 THz and weak single-mode lasing at 5.2 THz at 100K. To increase the operating temperature and lasing radiation inten sity\, we introduced a physics of the current-driven instability in graphe ne Dirac plasmons (GDPs)\, succeeding in tunable resonant THz amplificatio n with the maximal gain of 9% at room temperature. The obtained gain was f ar beyond the well-known landmark level of the quantum mechanical limit of 2.3% when photons directly interact with electrons without excitation of graphene plasmons. A discovery of a new instability mechanisms of GDPs cal led Coulomb-drag instability as well as Zener-Klein-tunneling instability will also be introduced thanks to the strong viscous Dirac fermions of gra phene carriers. In terms of THz detection\, recently we experimentally dem onstrated 100-Gbit/s-class fast and sensitive THz detection in a graphene- channel transistor utilizing current-driven plasmonic\, photothermoelectri c\, and a new type of so-called three-dimensional rectification mechanisms . In the final part\, future trends and prospects including graphene-based van der Waals heterostructures as well as active control of the parity an d time-reversal symmetry are also addressed.\n\n3:00 pm – 3:15 pm: Coffe e Break\n\n3:15 pm – 4:15 pm\nTutorial – 3\n\nAndrei Sergeev\, U.S. Ar my Research Laboratory\n\nCounting of THz Photons based on Nanoscale Elect ron Heating\n\nAbstract: Superconducting single-photon detectors (SSPDs) o ffer unprecedented sensitivity at THz wavelengths that contain information critical for the prediction of climate change and understanding of the or igin of the Universe. SSPDs are the tool of choice for future Deep Space O ptical Communications (Deep Space Network)\, Space-Ground Communications ( Space-Ground Sensor Network)\, and medical imaging. SSPDs can be used to p rovide high-speed and energy-efficient transfer of big data from multiple sensors established at various network platforms\, they also open new poss ibilities in LiDAR (Light Detection and Ranging) and 3D imaging (Depth ima ging) to enhance sensing characteristics\, including range\, data acquisit ion duration\, depth resolution\, and illumination power. Current supercon ducting detectors are based on well-explored conventional superconductors. These materials provide good sensing performance\, but the potential for further improvements has been exhausted. For breakthroughs in sensor perfo rmance and sensing capabilities\, we must explore novel superconducting ma terials and novel sensing concepts. For this\, we can leverage recent adva nces in photonics and atomic-layer-by-layer molecular beam epitaxy synthes is of high-Tc cuprate superconductors. Cuprate heterostructures (CHS) may offer high and tunable transition temperature\, ultra-small electron heat capacity\, ultrafast phonon heat removal\, slow electron-phonon cooling\, intense electron heating\, low intrinsic noise\, and strong coupling to th e radiation\, fast and reconfigurable out-diffusion electron cooling\, and high scalability. CHSs present an excellent opportunity for developing ne xt-generation SSPDs and enhancing active 3D imaging\, including range\, da ta acquisition duration\, depth resolution\, and illumination power. This talk will discuss electron heating in nanoscale superconductors\, control of electron-phonon coupling by nanoscale disorder\, material properties of traditional superconducting films and cuprate heterostructures\, and opti mal design of SSPDs for various applications. I will also present a histor y of R&D devoted to THz SSPDs\, in particular innovative research at UB un der the guidance of Professor Vladimir Mitin. Finally\, I will discuss cha racteristics of current devices and evaluate performance of potential devi ces based on superconducting heterostructures.\n\nhttps://buffalo.zoom.us/ j/93565601922?pwd=QzVkMGNKT1hyM0hSdzBkMzhXeURVZz09\n\nRoom: 101\, Bldg: Da vis Hall\, State University of NY at Buffalo\, Amherst\, New York\, United States\, 14260\, Virtual: https://events.vtools.ieee.org/m/419860 LOCATION:Room: 101\, Bldg: Davis Hall\, State University of NY at Buffalo\, Amherst\, New York\, United States\, 14260\, Virtual: https://events.vtoo ls.ieee.org/m/419860 ORGANIZER:jmmoskal@ieee.org SEQUENCE:56 SUMMARY:IEEE Buffalo Section presents TeraTech 2024 tutorial URL;VALUE=URI:https://events.vtools.ieee.org/m/419860 X-ALT-DESC:Description: <br /><p><span style="color: rgb(0\, 0\, 0)\; font- size: 14pt\;"><strong>The tutorial will take place in Davis Hall 101 at UB North Campus or on Zoom link below.</strong></span></p>\n<p><span style=" font-size: 14pt\;"><strong>Tutorial Session\, </strong><strong>Chair: Vlad imir Mitin</strong></span></p>\n<p><span style="font-size: 12pt\;"><strong ><span style="font-size: 14pt\;">Sessions and presenters are:</span></stro ng></span></p>\n<p><strong>1:00 pm</strong><strong>&nbsp\;&ndash\; 2:00 pm </strong><br><strong>Tutorial &ndash\; 1</strong></p>\n<p>Michael Shur\, R ensselaer Polytechnic Institute</p>\n<p>Counterintuitive Physics of Terahe rtz Electronics.</p>\n<p>Abstract: In typical electronic layers formed at semiconductor heterointerfaces\, electron-electron collisions are so frequ ent that electrons form a two-dimensional viscous electronic fluid. (This is contrary to a popular belief that they form a two-dimensional electron gas.) The viscosity of this fluid in graphene at cryogenic temperatures is hundreds of times higher than the viscosity of honey. In conventional sem iconductors at room temperature\, viscosity is similar to glycerin viscosi ty &ndash\; still very important\, but not necessarily dominant. The elect ron transport in electronic (or hole) fluid was collision-dominated in mos t of the last century field effect transistors operating at room temperatu re. It is collision-dominated in modern Thin Film Transistors\, but in mor e advanced transistors (such as MOSFETs used in iPhone 15 pro) the electro n transport is ballistic or quasi-ballistic. Ballistic or quasi-ballistic electronic fluid supports the waves of electron density - called plasma wa ves that could resonate with impinging terahertz (THz) radiation and becom e unstable (amplifying or even generating THz radiation). At high intensit ies of impinging THz radiation\, plasma waves get transformed into shock w aves. Even more interesting is the physics of &ldquo\;plasmonic crystals&r dquo\; combining properties of a fluid and crystal. I will discuss &ldquo\ ;plasmonic boom&rdquo\; instabilities\, the instabilities controlled by bo undary conditions\, and transit time instabilities in plasmonic crystals. These instabilities provide the mechanisms for generating sub-THz and THz radiation for 6G communications and multiple other applications of THz ele ctronics. I will also present predictions and the first measured data on T esla-range DC magnetic fields generated in circular plasmonic crystals by circularly polarized THz radiation\, &nbsp\;and explain recently observed switching from decay to transparency to amplification in graphene plasmoni c crystals.&nbsp\;</p>\n<p><strong>2:00 pm &ndash\; 3:00 pm</strong><br><s trong>Tutorial &ndash\; 2</strong></p>\n<p>Taiichi Otsuji\, Tohoku Univers ity</p>\n<p>Plasmonic Terahertz Devices Using Graphene-Based 2D Materials< /p>\n<p>Abstract: Graphene has attracted considerable attention due to its massless and gapless energy spectrum. This lecture reviews recent advance s in the research of plasmonic terahertz (THz) devices using graphene-base d two-dimensional (2D) materials\, particularly highlighting the THz sourc es and detectors for use in future 6G/7G THz wireless communications syste ms. Carrier-injection pumping of graphene can enable negative-dynamic cond uctivity in the terahertz (THz) range leading to new types of THz lasers. We developed a prototype of a graphene channel laser transistor\, demonstr ating broadband amplified spontaneous emission from 1 to 7.6 THz and weak single-mode lasing at 5.2 THz at 100K. To increase the operating temperatu re and lasing radiation intensity\, we introduced a physics of the current -driven instability in graphene Dirac plasmons (GDPs)\, succeeding in tuna ble resonant THz amplification with the maximal gain of 9% at room tempera ture. The obtained gain was far beyond the well-known landmark level of th e quantum mechanical limit of 2.3% when photons directly interact with ele ctrons without excitation of graphene plasmons. A discovery of a new insta bility mechanisms of GDPs called Coulomb-drag instability as well as Zener -Klein-tunneling instability will also be introduced thanks to the strong viscous Dirac fermions of graphene carriers. In terms of THz detection\, r ecently we experimentally demonstrated 100-Gbit/s-class fast and sensitive THz detection in a graphene-channel transistor utilizing current-driven p lasmonic\, photothermoelectric\, and a new type of so-called three-dimensi onal rectification mechanisms. In the final part\, future trends and prosp ects including graphene-based van der Waals heterostructures as well as ac tive control of the parity and time-reversal symmetry are also addressed.& nbsp\; &nbsp\;</p>\n<p><strong>3:00 pm &ndash\; 3:15 pm: &nbsp\;Coffee Bre ak</strong></p>\n<p>&nbsp\;</p>\n<p><strong>3:15 pm &ndash\; 4:15 pm</stro ng><br><strong>Tutorial &ndash\; 3</strong></p>\n<p>Andrei Sergeev\, U.S. Army Research Laboratory</p>\n<p>Counting of THz Photons based on Nanoscal e Electron Heating</p>\n<p>Abstract: Superconducting single-photon detecto rs (SSPDs) offer unprecedented sensitivity at THz wavelengths that contain information critical for the prediction of climate change and understandi ng of the origin of the Universe. SSPDs are the tool of choice for future Deep Space Optical Communications (Deep Space Network)\, Space-Ground Comm unications (Space-Ground Sensor Network)\, and medical imaging. SSPDs can be used to provide high-speed and energy-efficient transfer of big data fr om multiple sensors established at various network platforms\, they also o pen new possibilities in LiDAR (Light Detection and Ranging) and 3D imagin g (Depth imaging) to enhance sensing characteristics\, including range\, d ata acquisition duration\, depth resolution\, and illumination power. Curr ent superconducting detectors are based on well-explored conventional supe rconductors. These materials provide good sensing performance\, but the po tential for further improvements has been exhausted. For breakthroughs in sensor performance and sensing capabilities\, we must explore novel superc onducting materials and novel sensing concepts. For this\, we can leverage recent advances in photonics and atomic-layer-by-layer molecular beam epi taxy synthesis of high-Tc cuprate superconductors. Cuprate heterostructure s (CHS) may offer high and tunable transition temperature\, ultra-small el ectron heat capacity\, ultrafast phonon heat removal\, slow electron-phono n cooling\, intense electron heating\, low intrinsic noise\, and strong co upling to the radiation\, fast and reconfigurable out-diffusion electron c ooling\, and high scalability. CHSs present an excellent opportunity for d eveloping next-generation SSPDs and enhancing active 3D imaging\, includin g range\, data acquisition duration\, depth resolution\, and illumination power. This talk will discuss electron heating in nanoscale superconductor s\, control of electron-phonon coupling by nanoscale disorder\, material p roperties of traditional superconducting films and cuprate heterostructure s\, and optimal design of SSPDs for various applications. I will also pres ent a history of R&amp\;D devoted to THz SSPDs\, in particular innovative research at UB under the guidance of Professor Vladimir Mitin. Finally\, I will discuss characteristics of current devices and evaluate performance of potential devices based on superconducting heterostructures.</p>\n<p><a href="https://buffalo.zoom.us/j/93565601922?pwd=QzVkMGNKT1hyM0hSdzBkMzhXe URVZz09">https://buffalo.zoom.us/j/93565601922?pwd=QzVkMGNKT1hyM0hSdzBkMzh XeURVZz09</a></p> END:VEVENT END:VCALENDAR