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 |
---|---|---|---|---|
3544 | 박사턱 공지입니다. (박길배, 홍지수, 정재현, 조성우) | 길배 | 2012.07.28 | 12654 |
3543 | 미팅 | 방장 | 2001.05.03 | 12641 |
3542 | Novera Optics 1억불 유치 | 이병호 | 2001.05.05 | 12535 |
3541 | 무제. | 김휘 | 2001.03.31 | 12486 |
3540 | 제 613차 그룹미팅 | 관리자 | 2021.06.10 | 12472 |
3539 | 인력 채용 | 이병호 | 2001.05.24 | 12466 |
3538 | 그룹미팅 | 방장 | 2001.03.27 | 12445 |
3537 | Citation report2 | 이병호 | 2001.07.14 | 12419 |
3536 | Nature Electronics | 이병호 | 2017.05.16 | 12392 |
3535 | Citation report 3 | 이병호 | 2007.02.12 | 12342 |