제 목 Micro/Nano-Structured On-Chip Photonics:
All-Dielectric Metamaterials and Frequency Comb Generation
강 사 Ph.D Sangsik Kim (Purdue University)
시 간 2016년 11월 17일 (목요일) 오전 11시
장 소 제1신공학관 301동 1112호
Abstract:
Silicon photonics, or more generally, on-chip photonics, uses high-index and low-loss dielectrics to confine and guide the light, and it has revolutionized photonic research both fundamentally and technologically. Chip-scale light confinement increases the light-matter interactions, and recent advances in high-Q microresonators have led to advances in various nonlinear optical phenomena such as Kerr frequency combs. In addition, silicon photonics has been recognized as a next generation computing technology, and many industrial companies and governments are actively working to implement. The compatibility with well-established CMOS manufacturing systems makes silicon photonics promising; however, there are still challenges in this area with the large device sizes (compared to nanometer-scale transistors) due to waveguide cross-talks and bending losses. In this talk, I will present my two recent research projects: 1) frequency comb generation with dispersion-engineered concentric resonators and 2) photonic skin-depth engineering with all-dielectric metamaterials. First, concerning the frequency comb research, I will present a concentric resonator that can engineer and significantly modify the dispersion. Strong anomalous dispersion has been demonstrated in a thin silicon nitride film which was previously thought to have high normal dispersion, and consequently unsuitable for frequency comb generation. Together with a mode-selective, tapered coupling scheme, coherent frequency combs and soliton pulses have been generated. Next, I will present a method to engineer the skin-depth of photonic waveguides using all-dielectric metamaterials. A new class of waveguide scheme, i.e., extreme skin-depth (e-skid) waveguide is introduced, and I experimentally demonstrate e-skid waveguides that reduce the waveguide cross-talks and bending losses significantly, thus enabling dense integration of optical waveguides on a chip.
Biography:
Sangsik Kim is currently a postdoctoral researcher in the School of Electrical & Computer Engineering at Purdue University. He received his Ph.D. in Electrical and Computer Engineering from Purdue University in 2015. He also received an M.S. from Purdue University in 2014 and a B.S. from Seoul National University in 2008. His research interests lie in the broad area of micro/nano-photonics, which encompasses on-chip Kerr frequency combs, silicon/metamaterial and silicon/plasmonic hybrid photonic devices, passive/active silicon photonics, plasmonic metal nanostructures, and nonlinear/quantum photonics.
댓글 0
번호 | 제목 | 글쓴이 | 날짜 | 조회 수 |
---|---|---|---|---|
3574 | 이창건 박사 청첩장(2023년 4월 22일 토요일 오후 6시 30분, 서울대학교 교수회관 야외 잔디마당) | 관리자 | 2023.04.14 | 753 |
3573 | 제 689차 그룹미팅 | 손현우 | 2023.04.05 | 102 |
3572 | 제 688차 그룹미팅 | 손현우 | 2023.04.03 | 71 |
3571 | 제 687차 그룹미팅 | 손현우 | 2023.03.22 | 94 |
3570 | 제 686차 그룹미팅 | 손현우 | 2023.03.22 | 66 |
3569 | 제 685차 그룹미팅 | 손현우 | 2023.03.22 | 46 |
3568 | 박순기 박사 청첩장 (2023년 3월 11일 토요일 낮 12시, 밀리토피아 호텔 웨딩센터 3층 카멜리아홀) | 관리자 | 2023.03.03 | 1165 |
3567 | 제 684차 그룹미팅 | 최태원 | 2023.02.06 | 146 |
3566 | 제 683차 그룹미팅 | 최태원 | 2023.01.30 | 77 |
3565 | 제 682차 그룹미팅 | 최태원 | 2023.01.19 | 78 |