scholarly journals Square-root non-Bloch topological insulators in non-Hermitian ring resonators

2021 ◽  
Author(s):  
Zekun Lin ◽  
Shaolin Ke ◽  
Xuefeng Zhu ◽  
Xun Li
Keyword(s):  
Topological Insulators ◽  
Ring Resonators ◽  
Square Root

Photonic non-Bloch quadrupole topological insulators in coupled ring resonators

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Zekun Lin ◽  
Lu Ding ◽  
Shuyue Chen ◽  
Shan Li ◽  
Shaolin Ke ◽  
...  
Keyword(s):  
Topological Insulators ◽  
Ring Resonators

scholarly journals Realization of Second-Order Photonic Square-Root Topological Insulators

ACS Photonics ◽  
2021 ◽  
Author(s):  
Wenchao Yan ◽  
Daohong Song ◽  
Shiqi Xia ◽  
Junfang Xie ◽  
Liqin Tang ◽  
...  
Keyword(s):  
Topological Insulators ◽  
Second Order ◽  
Square Root

Demonstration of corner states in photonic square-root higher-order topological insulators

2021 ◽  
Author(s):  
Wenchao Yan ◽  
Shiqi Xia ◽  
Xiuying Liu ◽  
Yuqing Xie ◽  
Liqin Tang ◽  
...  
Keyword(s):  
Topological Insulators ◽  
Higher Order ◽  
Square Root

scholarly journals A three-dimensional photonic topological insulator using a two-dimensional ring resonator lattice with a synthetic frequency dimension

2018 ◽  
Vol 4 (10) ◽  
pp. eaat2774 ◽  
Author(s):  
Qian Lin ◽  
Xiao-Qi Sun ◽  
Meng Xiao ◽  
Shou-Cheng Zhang ◽  
Shanhui Fan
Keyword(s):  
Screw Dislocation ◽  
Topological Insulator ◽  
Topological Insulators ◽  
Three Dimensional ◽  
Photonic Devices ◽  
Three Dimensions ◽  
Ring Resonators ◽  
Two Dimensional ◽  
Topological System ◽  
Frequency Axis

In the development of topological photonics, achieving three-dimensional topological insulators is of notable interest since it enables the exploration of new topological physics with photons and promises novel photonic devices that are robust against disorders in three dimensions. Previous theoretical proposals toward three-dimensional topological insulators use complex geometries that are challenging to implement. On the basis of the concept of synthetic dimension, we show that a two-dimensional array of ring resonators, which was previously demonstrated to exhibit a two-dimensional topological insulator phase, automatically becomes a three-dimensional topological insulator when the frequency dimension is taken into account. Moreover, by modulating a few of the resonators, a screw dislocation along the frequency axis can be created, which provides robust one-way transport of photons along the frequency axis. Demonstrating the physics of screw dislocation in a topological system has been a substantial challenge in solid-state systems. Our work indicates that the physics of three-dimensional topological insulators can be explored in standard integrated photonic platforms, leading to opportunities for novel devices that control the frequency of light.

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