A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electro...A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electrons in a metal are resonated with photons.The structural parameters are fine-tuned and the sensing performance of the sensor is studied.The results show that the maximum spectral sensitivity reaches 18 000 nm/RIU in the refractive index range of 1.24—1.32,and the maximum resolution is 5.56×10^(-6) RIU.The novel structure with high sensitivity and low refractive index provides a new perspective for fluid density detection.展开更多
This note settles the complexity of the single genotype resolution problemshowing it is NP-complete. This solves an open problem raised by P. Bonizzoni, G.D. Vedova, R.Dondi, and J. Li. The same proof also gives an al...This note settles the complexity of the single genotype resolution problemshowing it is NP-complete. This solves an open problem raised by P. Bonizzoni, G.D. Vedova, R.Dondi, and J. Li. The same proof also gives an alternative and simpler reduction of the NP-hardnessof Maximum Resolution problem.展开更多
基金supported by the Natural Science Foundation of Tianjin City (No.19JCYBJC17000)the National Natural Science Foundation of China (No.11905159)。
文摘A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electrons in a metal are resonated with photons.The structural parameters are fine-tuned and the sensing performance of the sensor is studied.The results show that the maximum spectral sensitivity reaches 18 000 nm/RIU in the refractive index range of 1.24—1.32,and the maximum resolution is 5.56×10^(-6) RIU.The novel structure with high sensitivity and low refractive index provides a new perspective for fluid density detection.
文摘This note settles the complexity of the single genotype resolution problemshowing it is NP-complete. This solves an open problem raised by P. Bonizzoni, G.D. Vedova, R.Dondi, and J. Li. The same proof also gives an alternative and simpler reduction of the NP-hardnessof Maximum Resolution problem.
