科研成果 by Year: 2017

2017
Plasmonic polarization-rotating emitters with metallic nano-groove antennas
Sun, C., Li, H., Gong, Q. & Chen, J. Plasmonic polarization-rotating emitters with metallic nano-groove antennas. Advanced Optical Materials (2017).
An on-chip polarization splitter based on the radiation loss in the bending hybrid plasmonic waveguide structure
and Chengwei Sun, Kexiu Rong, F.G.S.C.Q.G.J.C. An on-chip polarization splitter based on the radiation loss in the bending hybrid plasmonic waveguide structure. Applied Physics Letters 111, 101105 (2017). 访问链接Abstract
Polarization beam splitters (PBSs) are one of the key components in the integrated photonic circuits. To increase the integration density, various complex hybrid plasmonic structures have been numerically designed to shrink the footprints of the PBSs. Here, to decrease the complexity of the small hybrid structures and the difficulty of the hybrid micro-nano fabrications, the radiation losses are utilized to experimentally demonstrate an ultra-small, broadband, and efficient PBS in a simple bending hybrid plasmonic waveguide structure. The hybrid plasmonic waveguide comprising a dielectric strip on the metal surface supports both the transverse-magnetic (TM) and transverse-electric (TE) waveguide modes. Because of the different field confinements, the TE waveguide mode has larger radiation loss than the TM waveguide mode in the bending hybrid strip waveguide. Based on the different radiation losses, the two incident waveguide modes of orthogonal polarization states are efficiently split in the proposed structure with a footprint of only about 2.2 × 2.2 μm2 on chips. Since there is no resonance or interference in the splitting process, the operation bandwidth is as broad as Δλ = 70 nm. Moreover, the utilization of the strongly confined waveguide modes instead of the bulk free-space light (with the spot size of at least a few wavelengths) as the incident source considerably increases the coupling efficiency, resulting in a low insertion loss of <3 dB.
Room-Temperature Planar Lasers Based on Water-Dripping Microplates of Colloidal Quantum Dots
Rong, K., Sun, C., Shi, K., Gong, Q. & Chen, J. Room-Temperature Planar Lasers Based on Water-Dripping Microplates of Colloidal Quantum Dots. ACS Photonics 4, 1776–1784 (2017). 访问链接
Self-reference plasmonic sensors based on double Fano resonances
Wang, Y., Sun, C., Li, H., Gong, Q. & Chen, J. Self-reference plasmonic sensors based on double Fano resonances. Nanoscale 9, 11085-11092 (2017). 访问链接Abstract
High-sensitivity plasmonic refractive index sensors show great applications in the areas of the biomedical diagnostics, healthcare, food safety, environmental monitoring, homeland security, and chemical reaction. However, the unstable and complicated environments considerably limit their practical applications. By employing the independent double Fano resonances in a simple metallic grating, we experimentally demonstrated a self-reference plasmonic sensor, which significantly reduces the error contributions of the light intensity fluctuations in the long-distance propagation and local temperature variations at the metallic grating, and the detection accuracy is guaranteed. The numerical simulation shows that the two Fano resonances have different originations and are independent with each other. As a result, the left Fano resonance is quite sensitive to the refractive index variations above the metal surface, while the right Fano resonance is insensitive to that. Experimentally, a high figure of merit (FOM) of 31 RIU-1 and FOM* of 860 RIU-1 are realized by using the left Fano resonance. More importantly, by using the right Fano resonance as a reference signal, the influence of the light intensity fluctuations and local temperature variations are monitored and eliminated in the experiment. This simple self-reference plasmonic sensor based on the double Fano resonances may find important applications in high-sensitive and accurate sensing under the unstable and complicated environments, as well as multi-parameter sensing.
Multimode metallic double-strip waveguides for polarization manipulation
Gan, F., et al. Multimode metallic double-strip waveguides for polarization manipulation. Advanced Materials Technologies 1600248 (2017). 访问链接
Sharp phase variations from the plasmon mode causing the Rabi-analogue splitting
Wang, Y., et al. Sharp phase variations from the plasmon mode causing the Rabi-analogue splitting. Nanophotonics 6, 1101–1107 (2017). 访问链接
Widely Tuning Surface Plasmon Polaritons with Laser-Induced Bubbles
Gan, F., et al. Widely Tuning Surface Plasmon Polaritons with Laser-Induced Bubbles. Advanced Optical Materials 5, 1600545 (2017). 访问链接