Aluminum: A qualified material for Tamm plasmon polariton in visible band
Abstract
Tamm plasmon polariton (TPP) is a cavity mode confined in a multilayer structure consisting of a distributed Bragg reflector and a metallic layer. It can be excited with varied polarizations and any angle of incidence, attracting significantly growing attention recently. To date, the majority of TPP structures are constructed with gold or silver. The qualification of aluminum as an alternative material for TPP mode is pending. Here, we show that it is possible to realize comparable characteristics with aluminum (Al)-based TPP structures, in terms of spectral behavior, quality factor (Q-factor), and electric field enhancement. Experimentally, we demonstrate that Al is qualified for the TPP mode with an exceptionally narrow linewidth (∼17 nm), high Q-factor (∼35.8), and moderate field enhancement (2.38-fold) in the visible band. Moreover, we found that Al-based TPP structures are more tolerant to polarization divergences (with a polarization splitting of only 11 nm at the incidence angle of 50°) compared to noble metal counterparts. This work paves the way toward the usage of Al as a viable and low-cost material for TPP devices beyond noble metals.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (13)
Bobo Du
Jingmin Zhou
Department of Cardiology, Zhongshan Hospital, Shanghai Institute of Cardiovascular Diseases, Fudan University
Jinxian Lu
Key Laboratory of Physical Electronics and Devices of Ministry of Education & Shaanxi Key Laboratory of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University 1 , Xi'an 710049,
Xiaokang Li
Key Laboratory of Light Field Manipulation and Information Acquisition of Ministry of Industry and Information Technology & Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University 2 , Xi'an 710129,
Kangzhe Zhao
Key Laboratory of Light Field Manipulation and Information Acquisition of Ministry of Industry and Information Technology & Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University 2 , Xi'an 710129,
Qifa Wang
Key Laboratory of Light Field Manipulation and Information Acquisition of Ministry of Industry and Information Technology & Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University 2 , Xi'an 710129,
Yaping Hou
Fajun Xiao
Key Laboratory of Light Field Manipulation and Information Acquisition of Ministry of Industry and Information Technology & Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University 2 , Xi'an 710129,
Dexing Yang
Key Laboratory of Light Field Manipulation and Information Acquisition of Ministry of Industry and Information Technology & Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University 2 , Xi'an 710129,
Hua Lu
Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering
Zhaoyang Zhang
Yanpeng Zhang
Lei Zhang