visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2021-06-11 14:30 
일시 Jun. 11 (Fri.), 02:30 PM 
장소 Online seminar 
연사 Dr. Jin Woong Cha(KRISS) 

 

SRC Seminar

 

 

Engineering sound waves and vibrations in multi-mode nanomechanical systems

 

Dr. Jin Woong Cha

Quantum Technology Institute, KRISS

 

Jun. 11 (Fri.), 02:30 PM

Online seminar

https://kaist.zoom.us/j/89283252628
회의 ID: 892 8325 2628

암호: 916514

 

 

 

 

Abstract:

Nanoscale mechanical systems provide versatile physical interfaces with their ability to interact with various physical states, for example, electromagnetic fields (e.g., microwaves and optical light) and quantum states (e.g., spins and electrons). Therefore, engineering nanoscale sound waves and vibrations in nanomechanical systems is essential for a wide range of applications in sensing and information processing both in the classical and quantum regimes. My talk will focus on two different nanomechanical platforms I have recently worked on. In the first part of my talk, I will discuss a unique nanomechanical platform called nanomechanical lattices which enable electrically tunable phonon propagation dynamics [1] and topologically protected phonon transport [2] at MHz frequencies. This platform consists of arrays of mechanically coupled, free-standing silicon-nitride nanomechanical membranes that support propagating flexural elastic waves. For the second part of my talk, I will describe our recent studies on the cavity electromechanics in a superconducting nanoelectromechanical resonator implementing superconducting niobium [3]. This system demonstrates various optomechanical phenomena arising from the interaction of nanomechanical motions and microwave fields (e.g., phonon cooling and amplification, optomechanically induced reflection) and can be used in various applications such as quantum transducers. I will then conclude my talk by briefly describing our ongoing work at KRISS.

 

Reference:

[1] J. Cha, et al. Nature Nanotechnology 13, 1016-1020 (2018)

[2] J. Cha, et al. Nature 564, 229-233 (2018)

[3] J. Cha, et al. Nano Letters 21, 1800-1806 (2021)

 

 

Contact: SunYoung Choi, (sun.0@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

 

번호 날짜 장소 제목
418 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
417 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
416 2022-01-26 13:00  E6 #1501  An Introduction to Cohomology groups file
415 2018-10-12 16:00  E6-2. 1st fl. #1323  Direct observation of a two-dimensional hole gas at oxide interfaces file
414 2022-11-18 14:30  E6-2. 1st fl. #1323 & Zoom  Kondo cloud condensation in a highly-doped semiconductor metal file
413 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
412 2019-07-31 16:00  E6-2, #1323  Features of ballistic superconducting graphene file
411 2018-07-12 17:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6)  The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
410 2016-12-09 13:30  #1323(E6-2. 1st fl.)  Entanglement area law in strongly-correlated systems
409 2019-10-16 16:00  #1323 (E6-2, 1st fl.)  Emergent black holes and monopoles from quantum fields file
408 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
407 2016-11-24 16:00  #1323(E6-2. 1st fl.)  Harmonic oscillator physics with single atoms in a state-selective optical potential
406 2015-09-07 15:00  E6-2. 1st fl. #1318  Advanced Optical Materials and Devices at NRL
405 2021-05-14 16:00  Online seminar  Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
404 2016-04-12 16:00  E6-2. 1st fl. #1323  Confinement of Superconducting Vortices in Magnetic Force Microscopy
403 2017-04-28 14:30  E6-2. 1st fl. #1323  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
402 2015-12-11 15:45  E6-2, #1323  Dynamical mean field theory studies on heavy fermion system
401 2023-06-26 11:00  E6, Rm#1323  Quantum computing on magnetic racetracks with flying domain wall qubits
400 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
» 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file