visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2021-06-11 14:30 
연사  
장소 Online seminar 

 

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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
465 2015-12-17 11:00    Wavefront engineering for in-vivo Deep brain imaging
464 2022-12-20 16:00    Studying Baryonic Flow Across the Cosmic Scales Using Radio and Millimeter Wavelength Experiments
463 2016-10-18 15:00    “Hybrid quantum systems with mechanical oscillators”
462 2016-07-08 14:00    Electronic quasiparticles in the quantum dimer model
461 2015-11-24 16:00    Topology-based understanding of spin dynamics in inhomogeneously magnetized systems
460 2022-04-01 16:00    High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
459 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
458 2024-03-07 16:00    [CAPP seminars] Development of Superconducting Transition Edge Sensors at SRON file
457 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
456 2016-11-11 13:30    Bandgap Engineering of Black Phosphorus
455 2016-04-01 14:30    Interference of single charged particles without a loop and dynamic nonlocality
454 2016-05-31 16:00    Understanding 3D tokamak physics towards advanced control of toroidal plasma
453 2023-07-18 11:00    Non-Hermitian Casimir Effect of Magnons
452 2024-06-13 16:00    Magnonic $\varphi$ Josephson junction and its non-Hermitian Josephson diode effect
451 2023-09-14 16:00    [CAPP seminar] Dark matter searches in Water Cherenkov Detectors file
450 2018-05-11 14:30    Disordered Floquet topological insulators file
449 2016-12-09 16:00    Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
448 2022-05-13 14:30    Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
447 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
446 2015-12-11 13:30    Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9