Mach–Zehnder interferometers in photonic crystals
Mach–Zehnder interferometers in photonic crystals
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DOI：
10.1007/s11082-005-1124-5
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发表时间：
2005
影响因子：
3
通讯作者：
Alejandro Martínez;P. Sanchis;J. Marti
中科院分区：
文献类型：
--
作者：
Alejandro Martínez;P. Sanchis;J. Marti
光子晶体技术可以制造出具有低急剧弯曲损耗和超低群速度的光波导。最后一种特性对于开发基于对通过波导传输的信号的光学相位的受控修改的高度紧凑的光学设备特别感兴趣。在这些器件中，马赫-曾德尔干涉仪具有根本性的重要性，因为它可以用作更复杂的光学器件和功能的构建块，如滤光器、波长分解器、通道交织器、强度调制器、开关和光门。本文从理论上分析了在二维光子晶体中形成的两个不同长度的耦合腔波导组成的马赫-曾德尔干涉仪的性能。我们还给出了使用有限差分时域编码的仿真结果，证实了理论分析的正确性。对该结构在性能上的主要限制进行了讨论。
Photonic crystal technology allows the creation of optical waveguides with low sharp-bending losses as well as ultra-low group velocity. This last property is particularly interesting to develop highly-compact optical devices based on the controlled modification of the optical phase of the signals traveling through the waveguides. Among these devices, the Mach–Zehnder interferometer acquires fundamental importance because it can be used as a building block of more complex optical devices and functionalities such as optical filters, wavelength demultiplexers, channels interleavers, intensity modulators, switches and optical gates. In this paper, the performance of a Mach–Zehnder interferometer consisting of two coupled-cavity waveguides with different lengths created in a two-dimensional photonic crystal is theoretically analyzed. We also provide simulation results using a finite-difference time-domain code that confirm the theoretical analysis. The main limitations in the performance of the structure are addressed and discussed.