At present,it is very important to create new types of mirrors,nonlinear light frequency transformers and optical filters with controlled optical properties.In this connection,it is of great interest to study photonic...At present,it is very important to create new types of mirrors,nonlinear light frequency transformers and optical filters with controlled optical properties.In this connection,it is of great interest to study photonic crystals.Their dielectric permittivity varies periodically in space with a period permitting Bragg diffraction of light.In this paper,we have investigated the optical properties of mesoporous three-dimensional(3D)opal-type and one-dimensional(1D)anodic alumina photonic crystals,filled with different dielectrics,ferroelectrics and piezoelectrics.We have compared the optical properties of initial mesoporous photonic crystals and filled with different substances.The possibility of mesoporous photonic crystals using selective narrow-band light filters in Raman scattering experiments and nonlinear mirrors has been analyzed.The electromagnetic field enhancing in the case of exciting light frequency close to the stop band edges has been established.The optical harmonics and subharmonics generation in mesoporous crystals,filled with ferroelectrics and piezoelectrics was proposed.展开更多
By inserting an air cavity into a one-dimensional photonic crystal of LiF/GaSb, a tunable filter covering the whole visible range is proposed. Following consideration of the dispersion of the materials, through modula...By inserting an air cavity into a one-dimensional photonic crystal of LiF/GaSb, a tunable filter covering the whole visible range is proposed. Following consideration of the dispersion of the materials, through modulating the thickness of the air cavity, we demonstrate that a single resonant peak can shift from 416.1 to 667.3 nm in the band gap at normal incidence by means of the transfer matrix method. The research also shows that the transmittance of the channel can be maximized when the number of periodic Li F/Ga Sb layers on one side of the air defect layer is equal to that of the other side. When adding a period to both sides respectively, the full width at half maximum of the defect mode is reduced by one order of magnitude. This structure will provide a promising approach to fabricate practical tunable filters in the visible region with ultra-wide tuning range.展开更多
基金supported by Russian Foundation for Basic Research(RFBR)(grants 15-02-02882,16-08-00618,16-02-00488,16-52-00026)National Natural Science Foundation of China(Nos.51471162,51671183,51502294)China Scholarship Council.
文摘At present,it is very important to create new types of mirrors,nonlinear light frequency transformers and optical filters with controlled optical properties.In this connection,it is of great interest to study photonic crystals.Their dielectric permittivity varies periodically in space with a period permitting Bragg diffraction of light.In this paper,we have investigated the optical properties of mesoporous three-dimensional(3D)opal-type and one-dimensional(1D)anodic alumina photonic crystals,filled with different dielectrics,ferroelectrics and piezoelectrics.We have compared the optical properties of initial mesoporous photonic crystals and filled with different substances.The possibility of mesoporous photonic crystals using selective narrow-band light filters in Raman scattering experiments and nonlinear mirrors has been analyzed.The electromagnetic field enhancing in the case of exciting light frequency close to the stop band edges has been established.The optical harmonics and subharmonics generation in mesoporous crystals,filled with ferroelectrics and piezoelectrics was proposed.
基金Project supported by the National Natural Science Foundation of China(Nos.61575138,61307069,51205273)the Top Young Academic Leaders and the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi
文摘By inserting an air cavity into a one-dimensional photonic crystal of LiF/GaSb, a tunable filter covering the whole visible range is proposed. Following consideration of the dispersion of the materials, through modulating the thickness of the air cavity, we demonstrate that a single resonant peak can shift from 416.1 to 667.3 nm in the band gap at normal incidence by means of the transfer matrix method. The research also shows that the transmittance of the channel can be maximized when the number of periodic Li F/Ga Sb layers on one side of the air defect layer is equal to that of the other side. When adding a period to both sides respectively, the full width at half maximum of the defect mode is reduced by one order of magnitude. This structure will provide a promising approach to fabricate practical tunable filters in the visible region with ultra-wide tuning range.
