Nanjing University

Prof. Tao Li's Research Page    
      Surface Plasmon Photonics in DSL

--  NJU  --  CEAS  --  DSL  --

College of Engineering and Applied Sciences










Overview of Researches

 SPP Manipultaions

SPP as a bounded wave on metal surface, inherits many light beam characteristics on one hand, on the other hand, it also reveals new features according to two dimension confinement and its vectorial field configurations in nano-structures. Manipulating the SPP wave by tuning its phase, amplitude, and even polarization is our major goal, where new exciting optical phenomena are always expected. For examples, the non-diffracting beams, optical spin Haller effect, optical Rashba effect, and so on. Specifically, our research mainly focuses on the following
1) SPP beam engineering and in-plane holography.
2) Conversion between SPP and far field radiation.

 Photonic Integration & devices

One of the ultimate goals of the SPP research is to achieve the nanophotonic integration. Compact sources, modulators, and detectors are the main components. Our research aims to fulfill some kinds of the plasmonic integrated nanophotonic devices with alliance of nonlinear and active materials or devices. 
1) Nonlinear SPP integration with nonlinear medium.
2) Active SPP integration base on electrically pumped LED.
3) SPP devices including multiplexers, switches, logic gates, etc.

 Metamaterials & Metasurfaces

At optical frequencies, most metamaterials with metallic inclusions would be of the plasmonic excitations. Our research pays particular attention to the plasmonic excitations on the optical metamaterials, where vairous plasmonic coupling were exploited that give rise to improved negative refraction performance, multiple negative bands, polarization rotations and conversions, and so on. At present, our research on this part mainly focuses on the metamaterials and metasurfaces for the beam steering, polarization control, optical spin-orbital coupling, and so on.

 Quantum Plasmonics

Quantum information processing is promising field in the new generation information technology. To extend the plasmonic device to quantum region is an important direction in our research. Beyond the apparent goal for information process, optical simulation by plasmonics waveguides to mimic the processes in condensed matter physics,  cosmic physics would be exciting and useful. It is also what we concerned.
1) Quantum integration with entangled SPP.
2) Plasmonic quantum simulation and quantum walk.