量子材料中基于空间自相位调制的激光诱导电子相干性  

Laser-induced electron coherence based on spatial self-phase modulation in quantum materials

作　　者：黄逸轩 赵继民[1,2,3] HUANG Yixuan;ZHAO Jimin(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan,Guangdong 523808,China)

机构地区：[1]中国科学院物理研究所,北京凝聚态物理国家研究中心,北京100190 [2]中国科学院大学物理科学学院,北京100049 [3]松山湖材料实验室,东莞523808

出　　处：《光散射学报》2024年第1期52-62,共11页The Journal of Light Scattering

基　　金：北京市自然科学基金(4191003);国家重点研发计划(2021YFA1400201,2017YFA0303603);中国科学院稳定支持基础研究领域青年团队计划(YSBR-059);中国科学院战略性先导科技专项(XDB30000000);中国科学院对外合作项目(GJHZ1826);中国科学院创新交叉团队。

摘　　要：空间自相位调制是一种三阶非线性光学效应,又称光学克尔效应。空间自相位调制的物理机制为激光诱导的非局域电子相干性,是一种集体激发行为,非线性光学响应,演生现象。物质中电子在光场的驱动下以光学频率运动,获得由外场决定的相位,分离区域之间保持固定的由光场决定的相位差,从而演生出非局域电子相干性,其衍射光的平行光分量在远场形成一系列同心嵌套的圆锥形发射,在远场屏上形成干涉环,此即空间自相位调制。基于激光诱导在量子材料中产生电子相干性,可以实现全光开关,具有“以弱光控制强光”的特性,功能类似于光子学中的“三极管”。本文简要综述空间自相位调制的物理机理研究及其在全光开关领域的应用前景,重点梳理空间自相位调制在新阶段的发展以及微观物理机制。Spatial self-phase modulation(SSPM)is a third-order nonlinear optical response,also known as optical Kerr effect.The physics mechanism of SSPM is laser-induced nonlocal electron coherence,which is a collective excitation behavior,nonlinear optical response,and emergence phenomenon.Electrons in the matters move with optical frequency driven by light field and obtain phase determined by the external field.Electrons in separated domains preserve fixed phase difference and nonlocal coherence emerges.The parallel components of diffractive light form a group of concentric conical emissions,resulting in coherence rings in the far field screen.This phenomenon is SSPM.All-optical switching can be achieved based on laser-induced electron coherence in quantum materials,functioning as a“transistor”in photonics,because it can realize using a weak light to control a strong light.This article briefly reviews the investigations towards SSPM physics mechanism,as well as its potential applications in all-optical switching,emphasizing on the new progress and microscopic mechanism of SSPM.

关 键 词：自相位调制 激光诱导 电子相干性 非线性光学 全光开关 

分 类 号：O469[理学—凝聚态物理]