Theoretical investigation and optimization of rotation sensing in the new photonic crystal gyroscope based on the Sagnac effect using nonlinear photonic resonators

IF 1.8 4区物理与天体物理 Q3 PHYSICS, APPLIED

Modern Physics Letters B Pub Date : 2023-12-12 DOI:10.1142/s0217984924501379

Masoud Mohammadi, M. Seifouri, S. Olyaee

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Abstract

In this research, the angular rotation speed in a passive photonic gyroscope based on the combination of side nanoring resonators and compensating waveguides has been analyzed by creating nonlinear effects in the control factors of the rings using the Sagnac effect. This structure consists of a central waveguide, two identical square resonators, and an almost U-shaped waveguide. The U-shaped waveguide causes coupling between the two resonators in a counterclockwise (CCW) mode. In this structure, a phase shift has been created in the output from the interference of two clockwise (CW) and CCW waves inside the resonators, and according to this phase shift and the central wavelength, the angular rotation speed has been estimated. In the proposed design of the gyroscope, by managing the nonlinear effects in the radius and refractive index (RI) of the coupling and inner rods, we have been able to control the changes in power, phase, and wavelength of the output from the device. With the increase in the intensity of power, the output power has an increasing slope at first, and at the point of creating a nonlinear effect in the sensor, the output power slope decreases. Also, this nonlinear effect directly affects the output phase of the structure. The maximum angular rotation speed in this gyroscope was [Formula: see text]/s. By changing the RI of the inner rods from 3.2 to 3.7, the maximum output-to-input power ratio changes from 0.38 W/[Formula: see text]m2 to 0.75 W/[Formula: see text]m2. By changing the radius of the coupling rods from 93 nm to 97 nm, the maximum power ratio decreases from 0.78 W/[Formula: see text]m2 to 0.55 W/[Formula: see text]m2. The field distribution profile and photonic bandgap in this gyroscope have been analyzed using the finite-difference time-domain (FDTD) and plane-wave expansion (PWE) methods, respectively. Also, the gyroscope has a footprint of 163.5 [Formula: see text]m2.

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基于萨格纳克效应、使用非线性光子谐振器的新型光子晶体陀螺仪旋转感应的理论研究与优化

在这项研究中，通过利用萨格纳克效应在环的控制因子中产生非线性效应，分析了基于侧纳谐振器和补偿波导组合的无源光子陀螺仪的角旋转速度。这种结构由一个中央波导、两个相同的方形谐振器和一个近似 U 形的波导组成。U 形波导使两个谐振器以逆时针（CCW）模式耦合。在这种结构中，谐振器内两个顺时针（CW）和逆时针（CCW）波的干涉输出产生了相移，根据相移和中心波长，可以估算出角旋转速度。在陀螺仪的拟议设计中，通过管理耦合杆和内杆的半径和折射率（RI）的非线性效应，我们能够控制设备输出的功率、相位和波长的变化。随着功率强度的增加，输出功率的斜率起初会增加，而在传感器中产生非线性效应时，输出功率的斜率会减小。同时，这种非线性效应会直接影响结构的输出相位。该陀螺仪的最大角旋转速度为 [计算公式：见正文]/s。通过将内杆的 RI 从 3.2 变为 3.7，最大输出与输入功率比从 0.38 W/[公式：见正文]m2 变为 0.75 W/[公式：见正文]m2。将耦合棒的半径从 93 nm 改为 97 nm，最大功率比从 0.78 W/[式中：见正文]m2降至 0.55 W/[式中：见正文]m2。利用有限差分时域法（FDTD）和平面波展开法（PWE）分别分析了该陀螺仪的场分布曲线和光子带隙。此外，该陀螺仪的占地面积为 163.5 [计算公式：见正文]平方米。

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来源期刊

Modern Physics Letters B 物理-物理：凝聚态物理

CiteScore

3.70

自引率

10.50%

发文量

235

审稿时长

5.9 months

期刊介绍： MPLB opens a channel for the fast circulation of important and useful research findings in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low-dimensional materials. The journal also contains a Brief Reviews section with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.