Tianyue Li <br/>

Tianyue Li

Tobey Leonard
Ph. D @NJU

About me

Hi! I am employed with Nanjing University, China, currently majoring in Optics and Photonics at Dielectric Superlattice Lab. under the supervision of Prof. Shining Zhu, Prof. Zhenlin Wang and Prof. Shuming Wang.

My research centers around Nanophotonics, with a focus on investigating the physical mechanisms and optical singularities associated with light-matter interaction. I strive to contribute to the advancement of this field by exploring new frontiers in light-field manipulation, topological photonics, and optomechanics. Additionally, I am actively engaged in the development of versatile nano-devices for on-chip and fiber-based platforms, including applications in optical tweezers, communication, and imaging.


Fundamental Research

Singularities of Eigenstates

Photonic band is a typical eigenvalue in optical system. Singularity occurs at the degenerate points of more than two energy bands, also known as Dirac point. The eigenvalues around Dirac points enriches physical connotations, such as the accompanying quantum spin Hall effect and quantum valley Hall effect with topological properties. Meanwhile, the photonic structures existing in open or gain-loss systems will split in the complex plane, and its non-Hermitian Hamiltonian has also aroused our interest, aiming to find the connections between these eigenvalues.

Collaborators: Prof. C. T. Chan (HKUST, Hong Kong), Prof. Jian-Hua Jiang (SIAR-USTC, Suzhou), Prof. Yun Lai (NJU, Nanjing)


Singularities of Light Fields

The light field is comprised of various physical properties, including wavelength, polarization, and phase. These parameters are subject to discontinuity, resulting in a cutoff point known as an optical singularity. Our research interests lie in two specific forms of optical singularities: the phase singularity carried by vortex fields and the polarization singularity arising from the momentum space. We aim to gain a deeper understanding of the physical mechanisms associated with these singularities within the light field.

Collaborators: Prof. Din Ping Tsai (CityU, Hong Kong), Dr. Yun Chen (XJU, Xi'an), and Prof. Jian-Ping Ding (NJU, Nanjing)


Derivative Applications

Versatile Nano-optomechanics for Meta-manipulation

Optical forces can be generated along with the light-matter interaction. Thanks to the overlap between the microstructure science and optical micromanipulation, the planar optical tweezers we developed based on plasmonic devices and metasurfaces enable to confine light into diffraction-limit level, so as to control Rayleigh particles with the ultracompact size; On the other hand, with the development of micro-nano manufacturing, we show the micro-structural materials based on photon-momentum transfer, named metavehicles. Our further research concentrates on the development of integrated on-chip optical tweezers and the mechanism of microstructural resonance.

Collaborators: Prof. Baoli Yao (XIOPM, Xi'an), Dr. Xiaohao Xu (XIOPM, Xi'an), and Dr. Jack. J. Kingsley-Smith (KCL, UK)


Advanced Optical communication and endoscopy

Optical communication plays an important role in communication and imaging. Although optical fiber possess the abilities of lossless and low cost, it is difficult to operate separately because of its small size and limited mode utilization. We have jointly developed some devices based on cross section of the end of fiber, which can adjust and control the fiber mode, further simplifying the size of devices after mode separation, and saving space costs for increasing communication channels and ultracompact imaging devices.

Collaborators: Prof. Fei Xu, Dr. Yifeng Xiong, Mr. Haotian Xu (NJU, Nanjing)



Publications

Contact

E-mail: leos4a@163.com.

Address: Room A-411, Cyrus Tang Building, School of Physics, Nanjing University.