We propose a highly refractive index sensor based on plasmonic Bow Tie configuration.The sensitivity of the resonator design is enhanced by incorporating a nanowall(NW)in a modified Bow Tie design where sharp tips of ...We propose a highly refractive index sensor based on plasmonic Bow Tie configuration.The sensitivity of the resonator design is enhanced by incorporating a nanowall(NW)in a modified Bow Tie design where sharp tips of V-junction are flattened.This approach provides high confinement of electric field distribution of surface plasmon polariton(SPP)mode in the narrow region of the cavity.Consequently,the effective refractive index(neff)of the mode increases and is highly responsive to the ambient medium.The sensitivity analysis of the SPP mode is calculated for six resonator schemes.The results suggest that the NW embedded cavity offers the highest mode sensitivity due to the large shift of effective index when exposed to a slight change in the medium refractive index.Moreover,the device sensitivity of the proposed design is approximated at 2300 nm/RIU which is much higher than the sensitivity of the standard Bow Tie configuration.展开更多
We propose a polarization-insensitive design of a hybrid plasmonic waveguide(HPWG)optimized at the 3.392µm wavelength which corresponds to the absorption line of methane gas.The waveguide design is capable of pro...We propose a polarization-insensitive design of a hybrid plasmonic waveguide(HPWG)optimized at the 3.392µm wavelength which corresponds to the absorption line of methane gas.The waveguide design is capable of providing high mode sensitivity(Smode)and evanescent field ratio(EFR)for both transverse electric(TE)and transverse magnetic(TM)hybrid modes.The modal analysis of the waveguide is performed via 2-dimension(2D)and 3-dimension(3D)finite element methods(FEMs).At optimized waveguide parameters,Smode and EFR of 0.94 and 0.704,can be obtained for the TE hybrid mode,respectively,whereas the TM hybrid mode can offer Smode and EFR of 0.86 and 0.67,respectively.The TE and TM hybrid modes power dissipation of~3 dB can be obtained for a 20-µm-long hybrid plasmonic waveguide at the 60%gas concentration.We believe that the highly sensitive waveguide scheme proposed in this work overcomes the limitation of the polarization controlled light and can be utilized in gas sensing applications.展开更多
基金This work was financially supported by the Ministry of Science and Higher Education within the State assignment FSRC“Crystallography and Photonics”RAS(Grant No.007-GZ/Ch3363/26).
文摘We propose a highly refractive index sensor based on plasmonic Bow Tie configuration.The sensitivity of the resonator design is enhanced by incorporating a nanowall(NW)in a modified Bow Tie design where sharp tips of V-junction are flattened.This approach provides high confinement of electric field distribution of surface plasmon polariton(SPP)mode in the narrow region of the cavity.Consequently,the effective refractive index(neff)of the mode increases and is highly responsive to the ambient medium.The sensitivity analysis of the SPP mode is calculated for six resonator schemes.The results suggest that the NW embedded cavity offers the highest mode sensitivity due to the large shift of effective index when exposed to a slight change in the medium refractive index.Moreover,the device sensitivity of the proposed design is approximated at 2300 nm/RIU which is much higher than the sensitivity of the standard Bow Tie configuration.
基金This work was financially supported by the Russian Foundation for Basic Research(Grant No.16-29-09528_ofi_m)for numerical calculationsby the Ministry of Science and Higher Education within the State assignment FSRC《Crystallography and Photonics》RAS(Grant No.007-GZ/Ch3363/26)for theoretical results.
文摘We propose a polarization-insensitive design of a hybrid plasmonic waveguide(HPWG)optimized at the 3.392µm wavelength which corresponds to the absorption line of methane gas.The waveguide design is capable of providing high mode sensitivity(Smode)and evanescent field ratio(EFR)for both transverse electric(TE)and transverse magnetic(TM)hybrid modes.The modal analysis of the waveguide is performed via 2-dimension(2D)and 3-dimension(3D)finite element methods(FEMs).At optimized waveguide parameters,Smode and EFR of 0.94 and 0.704,can be obtained for the TE hybrid mode,respectively,whereas the TM hybrid mode can offer Smode and EFR of 0.86 and 0.67,respectively.The TE and TM hybrid modes power dissipation of~3 dB can be obtained for a 20-µm-long hybrid plasmonic waveguide at the 60%gas concentration.We believe that the highly sensitive waveguide scheme proposed in this work overcomes the limitation of the polarization controlled light and can be utilized in gas sensing applications.
