The theoretical study of dielectric-chiral photonic crystal fiber （PCF） with an elliptical hollow core is presented. The band structure of chiral photonic crystal （PhC） is calculated by using a modified plane-wave...The theoretical study of dielectric-chiral photonic crystal fiber （PCF） with an elliptical hollow core is presented. The band structure of chiral photonic crystal （PhC） is calculated by using a modified plane-wave expansion （PWE） method. By examining the out-of-plane photonic bandgaps （PBGs） of chiral PhC, a kind of chiral PCF with a hollow core is designed and their eigenstates are calculated. The distributions of mode field and polarization state are demonstrated, and how the structural asymmetry of the core together with the chirality in the background affects the modal polarization is discussed. The dependences of birefringence on chirality for different ellipticities of core are investigated.展开更多
The hollow core photonic crystal waveguide biosensor is designed and described.The biosensor was tested in experiments for artificial sweetener identifcation in drinks.The photonic crystal waveguide biosensor has a hi...The hollow core photonic crystal waveguide biosensor is designed and described.The biosensor was tested in experiments for artificial sweetener identifcation in drinks.The photonic crystal waveguide biosensor has a high sensitivity to the optical properties of liquids flling up the hollow core.The compactness,good integration ability to different optical systems and compatibility for use in industrial settings make such biosensor very promnising for v arious biomedical applicat ions.展开更多
This paper proposes the design and characterization of microstructure optical fiber for gas sensing applications. The aim is to detect toxic and colorless gases over a wide transmission band covering 0.80 gm to 2.00gm...This paper proposes the design and characterization of microstructure optical fiber for gas sensing applications. The aim is to detect toxic and colorless gases over a wide transmission band covering 0.80 gm to 2.00gm wavelength. Numerical investigation is carried out by using the finite element method （FEM）. The numerical study shows that sensitivity of the proposed sensor is moderately increased by introducing four non-circular holes around the defected core of photonic crystal fiber and the confinement loss is also reduced. Furthermore, we confirm that increasing the diameter of central air core and size of the non-circular holes can improve the relative sensitivity and the confinement loss is reduced by increasing the diameter of air holes in the cladding. The enhancement of the relative sensitivity is more than 27.58% （0.1323 to 0.1688） at the wavelength 2=1.33gm that is the absorption line of methane （CH4） and hydrogen fluoride （HF） gases. The confinement loss of the fiber is 1.765x 10-8dB/m.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.60977032)
文摘The theoretical study of dielectric-chiral photonic crystal fiber （PCF） with an elliptical hollow core is presented. The band structure of chiral photonic crystal （PhC） is calculated by using a modified plane-wave expansion （PWE） method. By examining the out-of-plane photonic bandgaps （PBGs） of chiral PhC, a kind of chiral PCF with a hollow core is designed and their eigenstates are calculated. The distributions of mode field and polarization state are demonstrated, and how the structural asymmetry of the core together with the chirality in the background affects the modal polarization is discussed. The dependences of birefringence on chirality for different ellipticities of core are investigated.
基金supported by Grant No.224014 PHOTONICS4LIFE of FP7-ICT-2007-2Project No.1.4.09+3 种基金RF Governmental contracts 11.519.11.2035,14.B37.21.0728 and 14.B37.21.0563FiDiPro,TEKES Program(40111/11),FinlandSCOPES EC,Uzb/Switz/RF,Swiss NSF,IZ74ZO 137423/1RF President's Grant 1177.2012.2"Scientific Schools".
文摘The hollow core photonic crystal waveguide biosensor is designed and described.The biosensor was tested in experiments for artificial sweetener identifcation in drinks.The photonic crystal waveguide biosensor has a high sensitivity to the optical properties of liquids flling up the hollow core.The compactness,good integration ability to different optical systems and compatibility for use in industrial settings make such biosensor very promnising for v arious biomedical applicat ions.
文摘This paper proposes the design and characterization of microstructure optical fiber for gas sensing applications. The aim is to detect toxic and colorless gases over a wide transmission band covering 0.80 gm to 2.00gm wavelength. Numerical investigation is carried out by using the finite element method （FEM）. The numerical study shows that sensitivity of the proposed sensor is moderately increased by introducing four non-circular holes around the defected core of photonic crystal fiber and the confinement loss is also reduced. Furthermore, we confirm that increasing the diameter of central air core and size of the non-circular holes can improve the relative sensitivity and the confinement loss is reduced by increasing the diameter of air holes in the cladding. The enhancement of the relative sensitivity is more than 27.58% （0.1323 to 0.1688） at the wavelength 2=1.33gm that is the absorption line of methane （CH4） and hydrogen fluoride （HF） gases. The confinement loss of the fiber is 1.765x 10-8dB/m.
