Boyu Fan

Refractive index sensor based on hybrid coupler with short-range surface plasmon polariton and dielectric waveguide

An integrated sensor based on a vertical hybrid coupler composed of a short-range surface plasmon polariton (SRSPP) waveguide and a SiNx dielectric waveguide has been realized. The output power of the sensor is observed to change drastically with the refractive index of the detection liquid, and the sensing region can be adjusted by varying the width of the SiNx waveguide. The resolution is estimated to be as high as 7.3 × 10−6 refractive index units. This sensor is expected to have significantly high effective sensitivity for detecting a hundred-nanometer-thick layer owing to the highly bounded field of the SRSPP mode.

Excitation of short range surface plasmon polariton mode based on integrated hybrid coupler

The excitation method of short range surface plasmon polariton mode with hybrid coupler structure is analyzed numerically.

Integrated sensor for ultra-thin layer sensing based on hybrid coupler with short-range surface plasmon polariton and dielectric waveguide

Based on a hybrid coupler composed of short-range surface plasmon polariton (SRSPP) and dielectric waveguides, an integrated sensor for ultra-thin layer sensing has been realized. The simulation and experiment results demonstrate that the thickness variation of detection layer (polymer layer) about several nanometers could be detected. The measured thickness-detection sensitivity is as high as 0.67 dB/nm. And the sensitive region for thickness variation of polymer layer can be adjusted widely by varying the thickness of the SRSPP waveguide.

Integrated Bio-sensor Based on SPP-Dielectric Hybrid Coupler

An integrated sensor utilizing short range surface plasmon polariton mode is realized and applied for detecting ultra-thin layer as well as biomolecule with rather high sensitivity.

Plasmonics-based polarization beamsplitter, sensors, and solar cells

This paper reports the research on plasmonics-based devices. Coupling characteristics of both long- and short-range surface plasmon polariton (SPP) waveguide are analyzed. Basing on the hybrid coupler structures, TM/TE polarization splitter and integrated sensor are developed. We also propose and demonstrate plasmonic enhanced organic solar cells using metal nanoparticles.

Coupling between dielectric waveguide mode and long range surface plasmon polariton waveguide mode

Coupling between long range surface plasmon polariton (LRSPP) waveguide mode and dielectric waveguide (DW) mode has been studied theoretically and experimentally. It is demonstrated that the fundamental and second-order TM-polarized mode of dielectric waveguide could couple with LRSPP mode efficiently, respectively.

Hybrid coupler with short range surface plasmon polariton and dielectric waveguide

A vertical coupler composed of short range surface plasmon polariton waveguide and dielectric waveguide is studied theoretically and experimentally. The short range surface plasmon polariton mode is excited efficiently by the dielectric waveguide mode within tens of microns. Meanwhile, based on the hybrid coupler, a highly compact polarizer and a high performance sensor for ultra-thin layer sensing could be achieved.

Refractive index sensor for ultra-thin layer based on short range surface plasmon polariton hybrid coupler

A highly integrated sensor based on the hybrid coupler, which is comprised of the short range surface plasmon polariton (SRSPP) and dielectric waveguides, is proposed for ultra-thin layer detection. The dependence of the coupling efficiency between SRSPP and dielectric waveguide mode on the refractive index change of detecting layer is analyzed theoretically. For a detecting layer thinner than 1/10 wavelength, the refractive index resolution can be high up to 5.5×10−6 RIU with large sensing range as 5×10−2 RIU and rather short sensing length as tens of microns.