Yalin Su

Publications (5)10.74 Total impact

• Article: Sensitive voltage interrogation method using electro-optically tunable SPR sensors.

  Zhiyou Wang, Zheng Zheng, Kun Wang, Yalin Su, Lei Liu, Lusheng Song, Yusheng Bian, Rui Hou, Shaopeng Li, Jinsong Zhu
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  ABSTRACT: A novel voltage interrogation method using electro-optically tunable waveguide-coupled surface plasmon resonance sensors is demonstrated. Before measurements, we use a bicell photodetector to detect the reflectance from the sensor and take the differential signal from the photodetector as the resonance condition. For different analytes, by scanning the DC voltage on the waveguide layer of the sensor chip, the resonance condition can be maintained the same. Under this condition, we record the values of this voltage, namely the resonant voltage. Theoretical calculations and experimental results show the resonant voltage has a highly linear and sensitive response to analyte's refractive index. This method is simple in configuration, and complicated signal processing algorithms can be avoided.
  Optics Express 12/2011; 19(27):26651-9. · 3.59 Impact Factor
• Article: Low-loss silicon-based hybrid plasmonic waveguide with an air nanotrench for sub-wavelength mode confinement

  Yalin Su, Zheng Zheng, Yusheng Bian, Ya Liu, Jiansheng Liu, Jinsong Zhu, Tao Zhou
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  ABSTRACT: A hybrid plasmonic waveguide based on a silicon-on-insulator substrate with an air trench is proposed and investigated. Theoretical analysis demonstrates that the nano-scale air trench could result in strong local field enhancement and tight mode confinement. Besides, the transmission loss of the fundamental hybrid plasmonic mode could also be reduced despite the existence of the high-index silicon rib. The proposed structure is compatible with standard nanofabrication process based on the silicon wafers and could enable various nanophotonic integrated components.
  Micro & Nano Letters 09/2011; · 0.94 Impact Factor
• Article: High-Sensitivity Electro-Optic-Modulated Surface Plasmon Resonance Measurement Using Multilayer Waveguide-Coupled Surface Plasmon Resonance Sensors

  Kun Wang, Zheng Zheng, Yalin Su, Yanmei Wang, Zhiyou Wang, Lusheng Song, Jim Diamond, Jinsong Zhu
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  ABSTRACT: Electro-optical modulated surface plasmon resonance detection is demonstrated using the prism-coupled, angular interrogation scheme, enabled by a three-layer, metal/electro-optical dielectric layer/metal-structure sensor. The tunable waveguide-coupled surface plasmon resonance effect of the sensor is exploited to carry out the detection of glucose solutions of different concentrations. It is experimentally shown that the waveguide-coupled surface plasmon resonance angle increases linearly with the applied voltage for fixed concentration. The linear regression slope of the relation between the resonant angle and the applied voltage linearly increases with the concentration of the analyte, and is used to find the concentration changes. In contrast to the previously studied semiconductor waveguide devices, the multi-layer thin film structure made on the glass substrate is not only much easier and cheaper to fabricate but also fully compatible with the widely used prism-coupled SPR systems. Further increase in the nonlinearity of the material could also enhance the sensitivity.
  Sensor Letters 03/2010; 8(2):370-374. · 0.82 Impact Factor
• Article: Dynamically modulated intensity interrogation scheme using waveguide coupled surface plasmon resonance sensors

  Xin Ma, Xinlong Xu, Zheng Zheng, Kun Wang, Yalin Su, Jiangfeng Fan, Rui Zhang, Lusheng Song, Zhiyou Wang, Jinsong Zhu
  Sensors and Actuators A Physical 01/2010; 157(1):9-14. · 1.80 Impact Factor
• Article: Hybrid differential interrogation method for sensitive surface plasmon resonance measurement enabled by electro-optically tunable SPR sensors.

  Kun Wang, Zheng Zheng, Yalin Su, Zhiyou Wang, Lusheng Song, Jinsong Zhu
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  ABSTRACT: A novel detection method enabled by electro-optically tunable waveguide-coupled surface plasmon resonance sensors is demonstrated. Both the WCSPR response of sensor and the interrogation light are varied simultaneously in this hybrid scheme. Modulation and demodulation of the sensor's response are achieved by applying a high-frequency AC electrical signal and electrically filtering the detected signal. Scanning the incident angle at a lower speed yields an angular dependent response. Theoretical analyses and experimental results show that the angular-dependent signal is closely related to the derivative of the SPR reflectivity with a sharp, linear jump near the minimum of the SPR peak. Thus, simple linear-fitting and zero-finding algorithms can be used to locate the SPR angle, and sophisticated data processing algorithms and electronic hardware can be avoided.
  Optics Express 04/2009; 17(6):4468-78. · 3.59 Impact Factor