基于光子共振隧穿的激光测距技术  

Laser Ranging Technology Based on Photonic Resonant Tunneling

作　　者：王智勇 贾志国 邵光存 李岸然 张开强 纪玉坤 钟明玉 Wang Zhiyong;Jia Zhiguo;Shao Guangcun;Li Anran;Zhang Kaiqiang;Ji Yukun;Zhong Mingyu(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China;Jining Keli Photoelectric Industrial Co.,Ltd.,Jining 272113,Shandong,China)

机构地区：[1]电子科技大学光电科学与工程学院,四川成都611731 [2]济宁科力光电产业有限责任公司,山东济宁272113

出　　处：《光学学报》2024年第8期273-281,共9页Acta Optica Sinica

摘　　要：从非连续介质波导构造的光子双势垒模型出发,建立了光子的双势垒量子贯穿理论,给出了光子穿透双势垒的量子概率公式。同时从解析和数值仿真两个角度分别讨论了行波光子和隐失波光子产生共振穿透效应所需的物理条件,研究了光子穿透概率与双势垒的几何尺寸、波导填充介质的折射率以及光子频率之间的依赖关系。比较不同物理条件下的仿真曲线,概括其物理规律。尤为重要的是,当双势垒由截止波导构成时,频率或双势垒结构参数发生细微变化会对光子穿透概率产生极大的影响。基于这些物理规律,初步探讨了光子的量子共振隧穿效应在一些光学器件设计中的潜在应用,重点研究了其在激光测距技术中的原理设计。Objective Photonic tunneling can be regarded as an optical analog for the quantum-mechanical barrier penetration of material particles.As the photon field has no charge and is not subject to the Pauli exclusion principle,some physical problems(such as tunneling time)become easier to study through photonic quantum tunneling,arousing great interest in the study of the quantum tunneling effect of photons.However,up to now,the quantum resonance tunneling phenomena of photons through a double-barrier have not been studied thoroughly.Photons in a state of quantum tunneling correspond to evanescent waves(i.e.,surface plasmon polaritons)that are the core concept of nanooptics.Thus,research on photonic resonance tunneling can reveal new physical laws in nanooptics and has potential application value in optical devices(such as optical sensors and optical transistors).Therefore,it is necessary to develop a systematic theory of photonic resonance tunneling through a double-barrier.The application of the resonance tunneling effect of photons in the design of pulse and phase laser ranging systems is an important subject worth studying.Methods A photonic double-barrier structure is formed by a rectangular waveguide with dielectric discontinuities(Fig.1).Seeing that the electromagnetic waves propagating along the waveguide satisfy the Helmholtz equation and can be expanded as a superposition of the waveguide modes transverse electric(TE)and transverse magnetic(TM),one can take the TE10 mode as an example.In this case,the electric field component and its first derivative for z are continuous at the boundaries between the two different media inside the waveguide,based on which and using the concept of the Poynting vector one can obtain the quantum tunneling probability formula of photons through the double-barrier.By employing the analytic method and numerical simulation,we can obtain the physical conditions required for the resonance penetration effect of propagating-wave and evanescent-wave photons,respectively.In addition,we ca

关 键 词：量子光学 电磁波导 量子隧穿 光子双势垒 共振穿透 激光测距 

分 类 号：TM15[电气工程—电工理论与新技术] O44[理学—电磁学]