Topological Nanophotonic Wavelength Router Based on Topology Optimization.

Hongyi Yuan,Maoliang Wei,Zhouhui Liu,Xiaoyong Hu,Cuicui Lu,Hongtao Lin

doi:10.3390/mi12121506

Abstract

The topological nanophotonic wavelength router, which can steer light with different wavelength signals into different topological channels, plays a key role in optical information processing. However, no effective method has been found to realize such a topological nanophotonic device. Here, an on-chip topological nanophotonic wavelength router working in an optical telecom band is designed based on a topology optimization algorithm and experimentally demonstrated. Valley photonic crystal is used to provide a topological state in the optical telecom band. The measured topological wavelength router has narrow signal peaks and is easy for integration. This work offers an efficient scheme for the realization of topological devices and lays a foundation for the future application of topological photonics.

Highlights

With the rapid development of integrated nanophotonic technology, the demand for high-performance nanophotonic devices with a small footprint and different functionality is increasing
Topological wavelength router can guide light with different wavelengths to different topological channels, which can increase the robustness of integrated nanophotonic chips and has good potential in the application of on-chip light signal processing in the future
Valley photonic crystal (VPC) [11,12], as an important kind of topological photonic system, has great application potential in on-chip nanophotonic devices because it can work in optical telecom band and is convenient for on-chip integration

Summary

Introduction

With the rapid development of integrated nanophotonic technology, the demand for high-performance nanophotonic devices with a small footprint and different functionality is increasing. Among these nanophotonic devices, wavelength router which can steer light with different wavelengths to different channels has broad application in many areas and plays a key role in integrated nanophotonic chips [1,2,3]. Valley photonic crystal (VPC) [11,12], as an important kind of topological photonic system, has great application potential in on-chip nanophotonic devices because it can work in optical telecom band and is convenient for on-chip integration.

Results

Discussion

Conclusion