受激声子极化激元与太赫兹光物理(特邀)

Stimulated Phonon Polariton and Terahertz Physics(Invited)

70多年前,黄昆先生提出了著名的“黄昆方程”和“声子极化激元”的理念,开启了极化激元研究的先河。迄今为止,黄昆方程作为以中国本土科学家命名的方程,仍然是描述极化激元最好的理论之一。在后续的几十年里,随着超快光学、纳米光学和太赫兹物理与技术的迅速发展,声子极化激元再次成为了研究的热点前沿,表面声子极化激元的相关研究为电磁波的局域和控制带来了新的维度。近几年,南开大学团队发展了黄昆方程,提出了“受激声子极化激元”的概念,逐步打开了声子极化激元参与并主导的光与物质相互作用研究的大门。基于受激声子极化激元的各种铌酸锂片上集成的太赫兹应用也得益于此,取得了长足的发展。本文对声子极化激元和受激声子极化激元等相关概念加以回顾,介绍受激声子极化激元参与下的光与物质的相互作用体系,并以太赫兹非线性光学和铌酸锂片上集成应用等研究为例,阐述声子极化激元和太赫兹物理领域近年来的发展。

More than 70 years ago,Prof.Huang Kun proposed the famous “Huang's equations” and the concept of “phonon polariton”,marking the beginning of polariton research.So far,the Huang Kun equation,named after a local Chinese scientist,remains one of the best theories for describing polaritons.In the following decades,with the rapid development of ultrafast optics,nanooptics,and terahertz physics and technology,phonon polaritons have once again become a hot research frontier.The related research on surface phonon polaritons has brought new dimensions to the localization and control of electromagnetic waves.In recent years,the team at Nankai University has developed the Huang's equations and proposed the concept of “stimulated phonon polaritons”,gradually opening the door to the study of light matter interactions in which phonon polaritons participate and lead.Various terahertz applications integrated on lithium niobate chips based on stimulated phonon polaritons have also benefited from this and achieved significant development.This article will review the relevant concepts of phonon polaritons and stimulated phonon polaritons,introduce the interaction system between light and matter under the participation of stimulated phonon polaritons,and take research on terahertz nonlinear optics and lithium niobate chip integration as examples to explain the recent development of phonon polaritons and terahertz physics.