An on-chip hybrid plasmonic light steering concentrator with ∼96% coupling efficiency

Nanoscale ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 5097-5104 ◽  
Author(s):  
Tian Zhang ◽  
Maoning Wang ◽  
Yong Yang ◽  
Fei Fan ◽  
Takhee Lee ◽  
...  

TE-polarized light was used to excite on-chip surface plasmon polaritons to achieve both steering and nanofocusing function.

2016 ◽  
Vol 5 (2) ◽  
pp. e16034-e16034 ◽  
Author(s):  
Shan Shan Kou ◽  
Guanghui Yuan ◽  
Qian Wang ◽  
Luping Du ◽  
Eugeniu Balaur ◽  
...  

2021 ◽  
Vol 33 (5) ◽  
pp. 255-258
Author(s):  
Kai-Da Xu ◽  
Ying-Jiang Guo ◽  
Qian Yang ◽  
Yong-Liang Zhang ◽  
Xianjin Deng ◽  
...  

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yuanhai Lin ◽  
Thanh Xuan Hoang ◽  
Hong-Son Chu ◽  
Christian A. Nijhuis

AbstractAccess to surface plasmon polaritons (SPPs) with directional control excited by electrical means is important for applications in (on-chip) nano-optoelectronic devices and to circumvent limitations inherent to approaches where SPPs are excited by optical means (e.g., diffraction limit). This paper describes directional excitation of surface plasmon polaritons propagating along a plasmonic strip waveguide integrated with an aperiodic groove array electrically driven by an Al–Al2O3–Au tunnel junction. The aperiodic groove array consists of six grooves and is optimized to specifically reflect the SPPs by 180° in the desired direction (+x or −x) along the plasmonic strip waveguide. We used constrained nonlinear optimization of the groove array based on the sequential quadratic programming algorithms coupled with finite-difference time-domain (FDTD) simulations to achieve the optimal structures. Leakage radiation microscopy (Fourier and real plane imaging) shows that the propagation direction of selectively only one SPP mode (propagating along the metal–substrate interface) is controlled. In our experiments, we achieved a directionality (i.e., +x/−x ratio) of close to 8, and all of our experimental findings are supported by detailed theoretical simulations.


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