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 |
---|---|---|---|---|
3534 | 인력채용광고 | 이병호 | 2001.07.13 | 14723 |
3533 | 오랜만에 들릅니다. | ... | 2001.07.14 | 13199 |
3532 | Re:오랜만에 들릅니다. | 이병호 | 2001.07.14 | 12808 |
3531 | Citation report | 이병호 | 2001.07.14 | 11743 |
3530 | Citation report2 | 이병호 | 2001.07.14 | 12419 |
3529 | Citation report3 | 이병호 | 2001.07.14 | 8573 |
3528 | Citation report4 | 이병호 | 2001.07.14 | 9174 |
3527 | Citation report5 | 이병호 | 2001.07.14 | 29332 |
3526 | Citation report6 | 이병호 | 2001.07.14 | 7984 |
3525 | Citation report7 | 이병호 | 2001.07.14 | 7854 |