교육과학기술부 글로벌프론티어 (재)멀티스케일 에너지 시스템 연구단 (단장: 최만수 교수) 은 나노기술과 에너지 기술의 융합을 통하여 혁신적 미래 광에너지와 분자에너지 원천기술 개발을 목표로 하는 멀티스케일 에너지 시스템 연구사업을 추진하고 있습니다. 연구단에서는 격주로 멀티스케일 에너지 강좌를 개최합니다. 관심 있는 분들의 많은 참석 바랍니다.

1. 제  목 : Ultra high Q optical resonator and low loss waveguide on a Silicon Chip
2. 연  사 : 이한석 박사 (Cal Tech)
3. 일  시 : 2012년  2월 20일 (월)  16:00 ~ 17:00
4. 장  소 : 서울대 신공학관(301동) 117호 세미나실
5. 내  용 :

Abstract :
Ultra-high-Q optical resonators enabling storage of optical power near specific resonant frequencies have played an important role over a wide range of research fields including nonlinear optics, cavity optomechanics, quantum information and optical telecommunications. We demonstrate a new resonator on a silicon chip with a record Q factor of 875 million, surpassing even micro-toroids. This on-chip resonator is fabricated based on the standard semiconductor process without anomalous process such as silica reflow which was essential for micro-toroids, thereby expanding the range of integration opportunities and possible applications.
The techniques developed for ultra-smooth dielectric surface of the optical resonator to achieve high-Q property was used to enhance the performance of optical waveguide on a chip which lags far behind that of optical fiber, featuring attenuation rates many orders larger. We demonstrate monolithic waveguide as long as 27 meters with attenuation rates as low as 0.04dB/m, which is close to that of optical fiber when it was considered a viable technology.

6. 약  력 :
Hansuek Lee received the B.S. degree in electrical engineering from Seoul National University (SNU), Seoul, Korea, in 2001, and the Ph.D. degree in electrical engineering from SNU in 2008. Since 2008, he has been a researching scholar (now, a senior researching staff) in applied physics department at California Institute of Technology (CalTech), Pasadena, CA, where he is engaged in the development of ultra high Q resonators for nonlinear optics, nano-particle sensing, opto-mechanics and photon-atom interaction. His current research interests include silicon photonic integrated devices and nano-photonic devices.

7. 문  의 : 멀티스케일 에너지 시스템 연구단 연구지원본부 (☏ 889-6669,6670)
           남기태 교수 (재료공학부), 최만수 교수 (기계항공공학부)