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1.上海理工大学 光电信息与计算机工程学院, 上海 200093
2.江西师范大学 物理与通信电子学院, 江西 南昌 330022
[ "蒋强(1989-),男,湖南郴州人,博士研究生,主要研究方向为微纳光子器件理论及应用。E-mail:jiangqiangjq@126.com" ]
[ "陈家璧(1946-),男,江苏南京人,教授,博士生导师,主要研究方向为信息光学和医学光学。E-mail:jbchenk@163.com" ]
E-mail:bmliang78@aliyun.com
收稿日期:2016-09-06,
录用日期:2016-10-12,
纸质出版日期:2017-01-25
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蒋强, 陈家璧, 张磊, 等. 二维光子晶体中反常Doppler效应的相位演变[J]. 光学精密工程, 2017,25(1):34-41.
Qiang JIANG, Jia-bi CHEN, Lei ZHANG, et al. Phase evolution of inverse Doppler effect in two-dimensional photonic crystal[J]. Editorial office of optics and precision engineeri, 2017, 25(1): 34-41.
蒋强, 陈家璧, 张磊, 等. 二维光子晶体中反常Doppler效应的相位演变[J]. 光学精密工程, 2017,25(1):34-41. DOI: 10.3788/OPE.20172501.0034.
Qiang JIANG, Jia-bi CHEN, Lei ZHANG, et al. Phase evolution of inverse Doppler effect in two-dimensional photonic crystal[J]. Editorial office of optics and precision engineeri, 2017, 25(1): 34-41. DOI: 10.3788/OPE.20172501.0034.
光在具有负等效折射率的二维光子晶体中传输时会产生反常Doppler现象,为了分析光在该反常效应中传输时的相位变化,首先用时域有限差分(FDTD)法仿真了光经过静止光子晶体时的负折射现象,然后对光子晶体中沿光传输方向的Bloch波做快速傅里叶(FFT)处理。对滤波后的频谱,用iFFT反演出各平面波分量,并通过分析各平面波分量的相位演变,分离出与负折射产生有关的后退波分量。然后,将实验中的连续运动过程分解为各静止瞬间,分析了各相邻时刻探测面上信号光和参考光的相位变化,此处两束光的相位变化差随时间的变化量就是差频。静态FDTD方法仿真计算得到的差频与理论值的误差约为20%,能较好解释反常Doppler效应发生过程中光的相位变化。本文的研究揭示了反常Doppler效应发生时光子晶体中起作用的分量的相位变化,也为研究光在运动介质中的传输特性提供了新的思路。
The inverse Doppler effect in two dimensional photonic crystal with negative index was proved. In order to analysis the phase evolution of light propagated through this effect
the negative refraction was simulated in static photonic crystal by the Finite Difference Time Domain (FDTD) method. Subsequently
the Bloch wave along the propagating direction was analyzed based on the Fast Fourier Transform (FFT) method. Then
the components were retrieved by iFFT method from the filtered spectrum. The phase evolution of each component was analyzed for the extraction of the backward wave component related to the negative refraction. Furthermore
the phase evolution of signal beam and reference beam on the detecting surface was deduced by dividing the continuous movement of the platform into a series of static moment
where the variation of phase difference with time is the beat frequency. These values obtained with this method are closed to the theoretical values
with an error of 20%
which can explain the phase evolution of light in the inverse Doppler effect. The result reveals the phase evolution of the backward wave in photonic crystal
and provides a new way in dealing with the case of light passing through moving objects.
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QIAN W, CHEN J B. A survey on principal and experimental development of inverse Doppler effect[J]. Optical Instruments, 2009,31(6):86-90.(in Chinese)
RAN J, ZHANG Y W, FANG K, et al.. Realization of the inverse Doppler effect in tunable transmission lines[C]. Proceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, IEEE, 2015:552-553.
GHAFOOR F, BACHA B A, KHAN S. Inverse Doppler shift and control field as coherence generators for the stability in superluminal light[J]. Physical Review A, 2015, 91(5):053807.
RAN J, ZHANG Y W, CHEN X D, et al.. Realizing tunable inverse and normal Doppler shifts in reconfigurable RF metamaterials[J].Scientific Reports, 2015, 5:11659.
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CHEN J B, WANG Y, JIA B H, et al.. Observation of the inverse Doppler effect in negative-index materials at optical frequencies[J]. Nature Photonics, 2011,5(4):239-245.
梁斌明,胡艾青,蒋强,等. 光子晶体负折射效应在糖溶液浓度检测中的应用[J]. 光学精密工程, 2014,22(4):877-883.
LIANG B M, HU A Q, JIANG Q, et al..Application of photonic crystal negative refraction effect to sugar solution concentration detection[J]. Opt. Precision Eng., 2014,22(4):877-883.(in Chinese)
蒋强, 梁斌明, 胡艾青,等. 基于自准直效应和法布里珀罗腔的太赫兹波调制器[J]. 激光与光电子学进展, 2013,50(6):062301.
JIANG Q, LIANG B M, HU A Q, et al..Terahertz-wave modulator based on self-collimation effect and Fabry-Perot[J]. Laser & Optoelectronics Progress, 2013,50(6):062301.(in Chinese)
陈胜钰,庄冬霞,强则煊,等. 基于自准直效应的硅基光子晶体1×4光复用器[J]. 光学精密工程, 2012,20(12):2626-2632.
CHEN SH Y, ZHUANG D X, QIANG Z X, et al..1×4 optical multiplexer based on self-collimation effect in silicon photonic crystals[J]. Opt. Precision Eng., 2012,20(12):2626-2632.(in Chinese)
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