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BEGIN:VEVENT
SUMMARY:QSE Quantum Seminar - Gil-Ho Lee
DTSTART:20250721T120000
DTEND:20250721T133000
DTSTAMP:20260524T085815Z
UID:9494971486f49408b3ea7072cea9eb01b9513b6347053cf26e99ec78
CATEGORIES:Conferences - Seminars
DESCRIPTION:Gil-Ho Lee\nPlease join us for the QSE Center Quantum Semin
 ar with Gil-Ho Lee from POSTECH\, South Korea who will give the talk
  "Understanding and utilizing graphene-based Josephson junctions" on Mon
 day July 21st from 12pm to 1:30pm \nLocation: CM 1 104\n\nPizzas will be
  available between the seminars at 12:00. All PhDs\, postdocs\, students\
 , and PIs are welcome to join us.\n\nTITLE: "Understanding and utilizing g
 raphene-based Josephson junctions"\n\nABSTRACT:\nRecent experimental works
  on graphene Josephson junctions (GJJs) will be discussed to understand th
 e Andreev bound states (ABS) that govern the device physics of proximity J
 osephson junctions. Here\, we implemented superconducting tunneling spectr
 oscopy to investigate: (i) steady Floquet-Andreev states upon microwave ir
 radiation\, (ii) gate-tunable ABSs in bilayer graphene Josephson junctions
 \, and (iii) topological Andreev bands in three-terminal GJJs.\nIn the lat
 ter half\, we focus on utilizing GJJs as sensitive detectors for microwave
  photons and potentially dark matter. By exploiting the minute electronic 
 specific heat and thermal conductivity of graphene\, we demonstrated a GJJ
 -based microwave bolometer with a fundamentally limited noise-equivalent p
 ower\, corresponding to the energy resolution of a single 32-gigahertz pho
 ton. We will introduce our effort for (i) optimizing GJJ parameters for be
 tter detection performance\, (ii) improving superconducting contacts to gr
 aphene\, and (iii) calibrating the detection performance for single photon
 s across a wide spectrum.\n\nBIO:\nGil-Ho Lee received a Ph.D. in physics 
 from the Pohang University of Science and Technology (POSTECH) in South Ko
 rea in 2014. He was a postdoctoral researcher at Harvard University from 2
 014 to 2017. In 2017\, he joined the Department of Physics at POSTECH\, wh
 ere he is currently an associate professor. His research interest includes
  quantum transport and macroscopic quantum phenomena of a superconductor/g
 raphene hybrid nano-device\, topological superconductivity of superconduct
 or/topological material hybrid structures\, non-equilibrium quantum physic
 s in nano-devices\, ultrabroad-bandwidth single-photon detection technolog
 y based on graphene Josephson junction\, relativistic electronic optics ph
 enomena in high-quality graphene\, and Floquet quantum states in nano-devi
 ces.
LOCATION:CE 1 104 https://plan.epfl.ch/?room==CE%201%20104
STATUS:CONFIRMED
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