[Dec. 1] Physics Special Seminar - Dr. Jun-Ho Suh (KRISS)

물리학과 특별세미나 개최 안내

물리학과에서는 특별세미나를 아래와 같이 개최하오니 관심있는 분들의 많은 참석을 바랍니다.

1. 연사: 서준호 박사 (한국표준과학연구원)
2. 일시: 2022. 12. 1(목), 오후 4시
3. 장소: 공학3동 302호 (세미나실)

4. 제목: Mechanical oscillators for quantum technology

Mechanical oscillators provide a novel platform to harness phonons as a resource for quantum technology. Their unique versatility in bridging a broad spectrum of quantum systems has raised attention to utilizing them as quantum transducers. In this talk, I describe our recent results on developing mechanical oscillator devices suitable for quantum sensing applications. First, our cavity electromechanical devices with superconducting niobium implement optomechanical interactions at microwave frequency to demonstrate significant enhancement in the operating temperature, magnetic fields, and microwave powers. The devices exhibit a microwave frequency comb emerging from nonlinear interactions between the microwave and mechanical oscillation. These results could lead to mechanical quantum sensors of spins aided with precision comb-based frequency determination. Second, we explore new directions for mechanical quantum sensors with novel material systems. By employing semiconductor or topological insulator nanowires in cavity electromechanical systems, the mechanical oscillators demonstrate new functionalities such as precision microwave bolometers and quantum capacitance sensors. Finally, I discuss a new research direction of exploring optomechanical oscillators coupled to millimeter wave photons. The strong photon-phonon interactions at millimeter wave frequency is expected to bring us closer to the long-standing goal of real-time control of macroscopic mechanical quantum states and also toward a new perspective on quantum technology with mechanical oscillators.