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| 1 | Generation of squeezed states of light in arbitrary complex amplitude transverse distribution显示文摘The squeezed state is important in quantum metrology and quantum information.The most effective generation tool known is the optical parametric oscillator(OPO).Currently,only the squeezed states of lower-order spatial modes can be generated by an OPO.However,the squeezed states of higher-order spatial modes are more useful for applications such as quantum metrology,quantum imaging,and quantum information.A major challenge for future applications is efficient generation.Here we use cascaded phase-only spatial light modulators to modulate the amplitude and phase of the incident fundamental mode squeezed state.This efficiently generates a series of squeezed higher-order Hermite–Gauss modes and a squeezed arbitrary complex amplitude distributed mode.The method may yield new applications in biophotonics,quantum metrology,and quantum information processing. | LONG MA HUI GUO HENGXIN SUN KUI LIU BIDA SU AND JIANGRUI GAO | 2020 | Photonics Research2020，8，9： | 2 |
| 2 | Direct Optical Resolution of Chiral Pesticides by High Performance Liquid Chromatography显示文摘Enantiomer separation is one of the most important prerequisites for the investigation of environmental enantioselective behavior for chiral pesticides.The enantiomeric separation of three chiral pesticides,indoxacarb,lambda-cyhalothrin,and simeconazole,were studied on cellulose tris-(3,5-dimethylphenyl-carbamate)-coated chiral stationary phase(CDMPC-CSP) using high-performance liquid chromatography under normal phase condition.The effects of chromatographic conditions,such as the mobile phase composition including the concentration and type of alcohol modifiers in hexane,flow rate and column temperature,on enantiomer separation were examined.The thermodynamical mechanism of enantioseparation and chiral recognition mechanism were discussed.Better separation were achieved using 20% n-propanol for indoxacarb,2% iso-butanol for lambda-cyhalothrin,and 20% iso-propanol for simeconazole as modifiers in hexane at 25℃ with the selectivity factor(a) of 1.69,1.82 and 1.70,respectively.The resolution factor(Rs) decreased as the flow rate increased from 0.4 to 1.1 ml·min-1.The retention factor(k') and selectivity factor for the enantiomers of analytes decreased as temperature increased.The lna-1/T plots for racemic chiral pesticides were linear in the range of 15-35℃ in hexane/iso-propanol and the chiral separation was controlled by enthalpy.Hydrogen bonding,π-π and dipole-dipole interactions between enantiomers and CDMPC-CSP play an important role in chiral identification,and the fitting of the asymmetric portion of solutes in a chiral cavity or channel of the CSP is also important. | LI Xiaogang LIU Yiping HU Changdi BAI Lianyang GAO Bida HUANG Kelong | 2011 | Chinese Journal of Chemical Engineering2011，19，4： | 1 |
| 3 | Application of Nuclear rDNA Phylogeny in Coniferopsida and Taxaceae显示文摘Due to differences in morphology, ecology and biology, the phylogenesis of Coniferopsida and Taxaceae remains controversial, and the phylogenetic relationship of Pseudotaxus is yet to be confirmed. Three rDNA regions, ITS1, 5.8S rDNA, and ITS2, were prepared for 77 species belonging to seven families of Coniferopsida, including Taxaceae. Maximum parsimony(MP)and Neighbor-joining(NJ) analyses were performed. Results showed that:(1) the Coniferopsida species formed three branches:(Taxaceae, Cephalotaxaceae, Cupressaceae, Taxodiaceae),(Araucariaceae, Podocarpaceae), and(Pinaceae);(2) Taxaceae included Taxus, Pseudotaxus, Amentotaxus, and Torreya; and(3) Pseudotaxus belonged to Taxaceae, with a support rate of 97%in MP analyses and 99% in NJ analyses. | Qian ZHOU Minjie JIANG Bida GAO | 2016 | Agricultural Science & Technology2016，17，8： | 0 |
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