Nonlinear Plasmonics Metasurface

• Main Authors: Wei-Yi Tsai, 蔡瑋義
• Other Authors: Din Ping Tsai
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/qfvt9k

博士 === 國立臺灣大學 === 應用物理研究所 === 105 === In the past several decades, researches have devoted to understanding the responses of interaction between electrons under strong light excitation in nonlinear optics. There are a number of practical applications based on the concept of nonlinear optics, such as ultrafast pulse, tunable light source (Optical parametric oscillator), and super resolution imaging. Photonics plasmons with the characteristics of tight light confinement and significant light enhancement exhibit great potential for developing the practical nonlinear devices. In this dissertation, the nonlinearity of novel three-dimension structure, vertical split ring resonator (VSRR), is subsequently investigated both in time and frequency domain(time-averaged). We have demonstrated the additional access of VSRR provides significant enhancement to improve second harmonic generation (SHG) signal, generate dual nonlinear polarization states, as well as guide the nonlinear signal achieving nonlinear light manipulation. Comparisons of the nonlinear conversion efficiency between planer split ring resonator (SRR) and VSRR are discussed. The contribution of multipoles is also investigated for directly getting insight into underlying nonlinear conversion mechanism of VSRR.