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
142 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
141 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
140 2019-04-19 16:00  E6-2. 1st fl. #1323  Graphene and hBN heterostructures file
139 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file
138 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
137 2017-06-02 14:30  E6-2. 1st fl. #1323  Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal) file
136 2022-09-30 14:30  E6-2. 1st fl. #1323 & Zoom  Putting a spin on the Josephson effect file
135 2022-11-18 14:30  E6-2. 1st fl. #1323 & Zoom  Kondo cloud condensation in a highly-doped semiconductor metal file
134 2022-09-30 16:00  E6-2. 1st fl. #1323 & Zoom  Spin-orbit torque-based spintronic devices file
133 2022-11-18 16:00  E6-2. 1st fl. #1323 & Zoom  Qubits, new experimental tools for physics file
132 2022-05-25 16:00  E6-2. 1st fl. #1323 / Zoom  Uncovering New Lampposts for Dark Matter: Continuum or Conformal
131 2016-04-01 14:30  E6-2. 1st fl. #1501  Interference of single charged particles without a loop and dynamic nonlocality
130 2016-04-01 16:15  E6-2. 1st fl. #1501  Cotunneling drag effect in Coulomb-coupled quantum dots
129 2016-03-11 16:00  E6-2. 1st fl. #1501  Jan. Switching handedness of of chiral solitons in Z4 topological insulators
128 2016-04-08 13:30  E6-2. 1st fl. #1501  Theoretical Overview of Iron-based superconductors and its future
127 2016-03-11 13:30  E6-2. 1st fl. #1501  Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder
126 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
125 2015-10-16 16:00  E6-2. 2nd fl. #2501  Fluctuations of entropy production in partially masked electric circuits
124 2015-09-14 14:00  E6-2. 2nd fl. #2501  Ultrafast X-ray Studies on Dynamics Matter in Extreme Conditions
123 2018-06-18 10:00  E6-2. 2nd fl. #2502  Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file