The magneto-optical effects of rare earth ferrite can be greatly improved by doping Ce^(3+)ions.CeFeO_(3)with high Ce^(3+)concentration has excellent magneto-optical properties in theory.And due to its perovskite stru...The magneto-optical effects of rare earth ferrite can be greatly improved by doping Ce^(3+)ions.CeFeO_(3)with high Ce^(3+)concentration has excellent magneto-optical properties in theory.And due to its perovskite structure it is more suitable to be deposited on the substrates of optical devices compared with the commercial garnet ferrite.In this paper,the pure phase Ce_(x)Fe_(2-x)O_(3)films were successfully obtained on the quartz glass and <100>-oriented SrTiO3crystal substrates by radio frequency magnetron sputtering.The effects of substrate and Ce:Fe ratio on the epitaxial orientation,magnetism and magnetooptical performance of films were systematically studied.For the Ce1.0Fe1.0O3/STO film,its MCD ellipticity(ψF) intensity can reach up to 4750(°)/cm in the visible band and 14090(°)/cm in near ultraviolet band.And it also shows a strong vertical magnetic anisotropy,which makes it maintain a good thermal stability when the device size is reduced.These mean that the Ce_(1.0)Fe_(1.0)O_(3)/STO film has a promising application in integrated optical communication devices.展开更多
To further improve the quality of the total focusing method(TFM)imaging,an ultrasonic TFM based on phase circular statistics vector(PCSV)has been presented.Firstly,the information of the signal phases of the full matr...To further improve the quality of the total focusing method(TFM)imaging,an ultrasonic TFM based on phase circular statistics vector(PCSV)has been presented.Firstly,the information of the signal phases of the full matrix capture(FMC)aperture data was extracted in the TFM implement processes.The phases of the same focusing pixel were regarded as the samples of the circular statistics.Then the PCSVs determined by the signal amplitudes and phases were acquired using the operation of saturation weighted statistics.Finally,the magnitudes of the PCSV were equivalent to the amplitudes of the TFM image.The results showed the TFM-PCSV was capable of improving SNR by amplifying the contribution of phase information.Also,the method could improve the lateral resolution by enhancing aperture beam directivity.Compared to the phase coherence weighted algorithm SCF and CCF,the TFM-PCSV had a higher tolerance to the error of phases.展开更多
基金Project supported by the National Natural Science Foundation of China (62105063,61875039,51972062)the Natural Science Foundation of Fujian Province (2021J05271)the Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China (2021ZZ125)。
文摘The magneto-optical effects of rare earth ferrite can be greatly improved by doping Ce^(3+)ions.CeFeO_(3)with high Ce^(3+)concentration has excellent magneto-optical properties in theory.And due to its perovskite structure it is more suitable to be deposited on the substrates of optical devices compared with the commercial garnet ferrite.In this paper,the pure phase Ce_(x)Fe_(2-x)O_(3)films were successfully obtained on the quartz glass and <100>-oriented SrTiO3crystal substrates by radio frequency magnetron sputtering.The effects of substrate and Ce:Fe ratio on the epitaxial orientation,magnetism and magnetooptical performance of films were systematically studied.For the Ce1.0Fe1.0O3/STO film,its MCD ellipticity(ψF) intensity can reach up to 4750(°)/cm in the visible band and 14090(°)/cm in near ultraviolet band.And it also shows a strong vertical magnetic anisotropy,which makes it maintain a good thermal stability when the device size is reduced.These mean that the Ce_(1.0)Fe_(1.0)O_(3)/STO film has a promising application in integrated optical communication devices.
基金supported by the National Natural Science Foundation of China(51705232,11764030,51705231)the State Key Laboratory of Acoustics(SKLA201806)+3 种基金the Natural Science Foundation of Jiangxi Province(20192BAB216026)the Superior Science and Technology Innovation Team Special Fund of Jiangxi Province(20171BCB24008)the Education Department Fund Item of Jiangxi Province(GJJ170577,GJJ170621)the Postgraduate Innovation Fund(YC2019046)。
文摘To further improve the quality of the total focusing method(TFM)imaging,an ultrasonic TFM based on phase circular statistics vector(PCSV)has been presented.Firstly,the information of the signal phases of the full matrix capture(FMC)aperture data was extracted in the TFM implement processes.The phases of the same focusing pixel were regarded as the samples of the circular statistics.Then the PCSVs determined by the signal amplitudes and phases were acquired using the operation of saturation weighted statistics.Finally,the magnitudes of the PCSV were equivalent to the amplitudes of the TFM image.The results showed the TFM-PCSV was capable of improving SNR by amplifying the contribution of phase information.Also,the method could improve the lateral resolution by enhancing aperture beam directivity.Compared to the phase coherence weighted algorithm SCF and CCF,the TFM-PCSV had a higher tolerance to the error of phases.
