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SUMMARY:Virtual MEchanics GAthering -MEGA- Seminar: Talk 1 - Lithium Nioba
 te based Micro Bulk Acoustic Resonators for communication\; Talk 2 - Piezo
 electric suspended microchannel resonators for biological applications
DTSTART:20210527T161500
DTEND:20210527T173000
DTSTAMP:20260511T114649Z
UID:293bd703f1e5daec87dbad3cf8921f72846f9f40abe816aa4093b87e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Soumya Yandrapalli & Damien Maillard (NEMS\, EPFL)\nTalk 1:
  Lithium Niobate based Micro Bulk Acoustic Resonators for communication\, 
 by Soumya Yandrapalli (NEMS\, EPFL)\n\nAbstract A bulk acoustic wave co
 nfined in a solid medium at micrometric or nanometric scales can be used i
 n high frequency applications to build oscillators and filters. Typically\
 , piezoelectric resonators are used as transducers: in actuation\, to prov
 ide electric excitation in order to generate standing bulk acoustic wave r
 esonance\; in detection\, to simultaneously read out this resonance in the
  form of an electrical signal. With the advent of 5G\, the current piezoel
 ectric resonator technologies need to leap forward in order to yield the v
 ery demanding requirements of higher data rates with low losses and strict
  tolerances. In this presentation\, I will talk about using piezoelectric 
 mono-crystalline Lithium Niobate micro resonators as a filter communicatio
 n element. We will discuss how these resonators can potentially solve curr
 ent frequency and bandwidth limitations. In particular\, I will present de
 sign\, fabrication and measurements results of a filter prototype which us
 es these resonators at 5GHz.\n\nBio Soumya Yandrapalli is currently a PhD
  in the Advanced Nano Electromechanical Systems Lab at EPFL. She received 
 her Master’s degree in Micro- and nanotechnologies for integrated system
 s (MNIS) from PoliTo\, INPG and EPFL. Her research focuses on using piezoe
 lectric resonators for sensing and communication.\n\nTalk 2: Piezoelectric
  suspended microchannel resonators for biological applications\, by Damie
 n Maillard (NEMS\, EPFL)\n\nAbstract Suspended microchannel resonators (
 SMRs) are singly- or doubly-clamped beams with an embedded microfluidic ch
 annel inside. Some applications of those devices consist of the measuremen
 t of the density or viscosity of liquid samples at the picoliter scale. In
  addition to that\, they can be used to characterize physical properties o
 f cells (density\, mass\, volume\, deformation) at the single entity level
 . An important aspect of SMRs is their transduction mechanism. So far\, mo
 st of the devices are being actuated with an external shaker\, while being
  detected optically\, with a lever or via laser Doppler vibrometry\, which
  can be cumbersome\, time-consuming and difficult to operate.\n\nIn our gr
 oup\, we have developed the first SMRs with full on-chip piezoelectric tra
 nsduction\, and we operate the devices without needing any external equipm
 ent apart from a lock-in amplifier. During this talk\, I will talk about h
 ow we can fabricate those devices\, and give an overview of some experimen
 ts that we have performed with polystyrene beads and populations of bacter
 ia.\n\nBio I have been a PhD student in the NEMS laboratory directed by P
 rof. Villanueva since 2017. Before that I did a Bachelor in microengineeri
 ng at EPFL\, with a third year as an Erasmus student in KTH\, Stockholm\, 
 and a Master in microengineering with specialization in micro/nano systems
 \, also at EPFL.
LOCATION:https://epfl.zoom.us/s/84678428267 Passcode: 174387 https://epfl.
 zoom.us/s/84678428267
STATUS:CONFIRMED
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