The spontaneous emission(SE) of Er3+ embedded in a double slot dielectric structure was studied by a quantum-electrodynamical formalism. The study shows that the slot width and the position of Er3+ in slot structure h...The spontaneous emission(SE) of Er3+ embedded in a double slot dielectric structure was studied by a quantum-electrodynamical formalism. The study shows that the slot width and the position of Er3+ in slot structure have a significant effect on the SE. The double slot waveguides were fabricated by embedding two low-index Er/Yb silicate material layers into high-index silicon. The radiative efficiency of Er3+ in the double slot waveguides is found to be higher than that of the single slot waveguide, which is consistent with the theory simulation. The 0.67 d B signal enhancement at 1.53 ?m in a 4.6-mm-long slot waveguide was observed pumped by 1476 nm laser. These results show the relevance of our model to study the SE processes in multilayer structures and are important for future realization of silicon-compatible active optical devices.展开更多
The title compound of trans-3-phenyl-2-propenoic acid (C9H802), a main active organic acid of cinnamon bark and styrax, was obtained by oxidization from trans-3-phenyl-2-propenaldehyde and characterized by X-ray dif...The title compound of trans-3-phenyl-2-propenoic acid (C9H802), a main active organic acid of cinnamon bark and styrax, was obtained by oxidization from trans-3-phenyl-2-propenaldehyde and characterized by X-ray diffraction analysis. It crystallizes in monoclinic system, space group P21/n with a = 5.55916(10), b = 17.4870(3), c = 7.70677(13) A, V = 744.89(2) A3, Z= 4, Dc= 1.321 g/cm3, Mr = 148.15, F(000) = 312, and/t μ=0.764 mm-1. A total of 2661 reflections with 1447 unique ones (Rint = 0.0137) were collected, in which 1447 were observed (I〉2σ(/)). There were two C9H802 molecules in an asymmetric unit. The structural unit was a dimer formed by the hydrogen bonding of the oxygen atom of carbonyl group and the hydrogen atom of hydroxyl group. A 3D layer structure was formed through hydrogen bonds and Van der Walls' forces.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.61377056 and 61320106001)the Program for New Century Excellent Talents in University
文摘The spontaneous emission(SE) of Er3+ embedded in a double slot dielectric structure was studied by a quantum-electrodynamical formalism. The study shows that the slot width and the position of Er3+ in slot structure have a significant effect on the SE. The double slot waveguides were fabricated by embedding two low-index Er/Yb silicate material layers into high-index silicon. The radiative efficiency of Er3+ in the double slot waveguides is found to be higher than that of the single slot waveguide, which is consistent with the theory simulation. The 0.67 d B signal enhancement at 1.53 ?m in a 4.6-mm-long slot waveguide was observed pumped by 1476 nm laser. These results show the relevance of our model to study the SE processes in multilayer structures and are important for future realization of silicon-compatible active optical devices.
基金The China Agriculture Research System(Grant No.CARS-21)the public welfare research special project in General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China(Grant No.201210209)
文摘The title compound of trans-3-phenyl-2-propenoic acid (C9H802), a main active organic acid of cinnamon bark and styrax, was obtained by oxidization from trans-3-phenyl-2-propenaldehyde and characterized by X-ray diffraction analysis. It crystallizes in monoclinic system, space group P21/n with a = 5.55916(10), b = 17.4870(3), c = 7.70677(13) A, V = 744.89(2) A3, Z= 4, Dc= 1.321 g/cm3, Mr = 148.15, F(000) = 312, and/t μ=0.764 mm-1. A total of 2661 reflections with 1447 unique ones (Rint = 0.0137) were collected, in which 1447 were observed (I〉2σ(/)). There were two C9H802 molecules in an asymmetric unit. The structural unit was a dimer formed by the hydrogen bonding of the oxygen atom of carbonyl group and the hydrogen atom of hydroxyl group. A 3D layer structure was formed through hydrogen bonds and Van der Walls' forces.