低维半导体—贵金属耦合杂化体系中超快光学现象及量子相干控制

This project mainly study ultrafast optical phenomena and quantum coherent control in low-dimensional semiconductor-noble metal nanostructure hybrid system. This theoretical study will found and expand the effective theoretical model and the exact numerical calculating program for describing the interaction between ultrafast pulsed laser and quantum system by including the surface plasmonic effect. In this project, we will investigate the ultrafast dynamics, new optical phenomena, and new mechnism in these hybrid system induced by ultrafast pulsed laser. We will also study the related temporal quantum coherence and interference and quantum emission, find the new method for the ultrafast control of these quantum effects and discuss the potential application in quantum information by including the surface plasmonic effect. Based on the plasmonic near-field enhancement, we will search for the new method of ehancing the ultrafast optical nonlinearity, and reveal the rule of high-order harmonics generation and new isolated ultrashort pulse emission modulated by the noble metal nanostructure. In.addition, the infuence of the plasmonics on ultrafast rotation of the electron spin in low-demensional semiconductor will be examined. The coupling and hybrid effects between the surface plasmon and exciton, quantum coherence, the excitation of carrier, and manipulation via ultrafast pulsed laser will also be studied deeply. It is sure that the research of the project will open up the new applications of all-optical ultrafast probing, and make great contributions to the advance of rising or cross disciplines such as ultrafast coherent and nonlinear optics, high-resolved nonlinear spectra, Ultra compact active quanutm devices, and quantum information etc..

该项目开展低维半导体—贵金属耦合杂化体系中超快光学现象及量子相干控制的研究。它旨在建立和发展基于表面等离激元效应的超快脉冲与半导体量子电子系统相互作用的有效理论和严格数值计算方法，揭示体系中超快脉冲量子相干控制表面等离激元相关超快动力学过程的新现象和新机制；研究并探寻表面等离激元相关超快瞬态相干、量子光辐射等量子光学新规律及调控的新原理和新方法，并探讨其在量子信息中的应用，如量子态的相干超快操控、电子自旋的超快旋转等；研究并揭示表面等离激元诱导非线性光学效应增强的机理和超快响应机制；研究表面等离激元与半导体量子电子系统耦合杂化及量子效应、载流子的激发及超快激光操控机理。该项目研究将开辟表面等离激元相关全新的超快探测和应用领域，促进纳米尺度体系超快相干非线性光学的交叉融合，对高精度非线性光谱学、超紧凑有源量子器件和和量子信息等高新技术的研发具有重要的科学意义和实践价值。

在本项目执行期间，本课题组按计划开展了低维半导体-贵金属耦合杂化体系中超快光学现象及量子相干控制研究。主要围绕本项目所涉及的量子电子系统、表面等离激元及微腔光子的相互作用领域开展研究。通过研究，本项目建立和发展了利用表面等离激元辅助的光与量子电子系统相互作用的有效理论和数值计算方法，研究了光诱导的上述相干杂化系统中的新光学现象，包括超快瞬态相干；揭示了杂化体系等离激元诱导相干的物理机制；通过引入和发展非线性波动理论，采用标准的半经典理论方法，系统、深入地研究了再量子电子系统及类似固态相干介质中的非线性光学现象，发展了包括光辐射、参量转换、相干传输及其调控的新原理和方法；提出了基于表面等离激元辅助的低维量子电子系统与光学微腔耦合体系的精密测量和精密传感的新方案。此外，通过追踪本课题密切相关的领域，课题组还将本项目所涉及的量子电子系统、表面等离激元及微腔光子的相互作用领域取得的成果推广至了微腔光子、半导体量子电子系统和机械振子杂化复合系统中。项目执行期间，课题组在国内外权威学术期刊发表标注本项目资助的SCI论文30篇，并招收和培养了研究生14名，其中博士生5名。