By combing artificial micro–nano structures,photonic crystals(PCs),with traditional semiconductor laser material to realize the dynamic collaborative control of photonic states and confined electrons,the band enginee...By combing artificial micro–nano structures,photonic crystals(PCs),with traditional semiconductor laser material to realize the dynamic collaborative control of photonic states and confined electrons,the band engineering of the PC has been confirmed.This brings new development space for the semiconductor laser,such as for low threshold and high efficiency.Based on a series of works by Zheng's group,this paper has reviewed kinds of PC lasers including electrical injection PC vertical cavity and lateral cavity surface-emitting lasers,and PC high beam quality lasers,to show that the PC is vital for promoting the continuous improvement of semiconductor laser performance at present and in the future.展开更多
Based on the fundamental equations of piezoelasticity of quasicrystal media, using the symmetry operations of point groups, the linear piezoelasticity behavior of one-dimensional（1D）hexagonal quasicrystals is invest...Based on the fundamental equations of piezoelasticity of quasicrystal media, using the symmetry operations of point groups, the linear piezoelasticity behavior of one-dimensional（1D）hexagonal quasicrystals is investigated and the piezoelasticity problem of 1D hexagonal quasicrystals is decomposed into two uncoupled problems, i.e., the classical plane elasticity problem of conventional hexagonal crystals and the phonon–phason-electric coupling elasticity problem of1 D hexagonal quasicrystals.The final governing equations are derived for the phonon–phasonelectric coupling anti-plane elasticity of 1D hexagonal quasicrystals.The complex variable method for an anti-plane elliptical cavity in 1D hexagonal piezoelectric quasicrystals is proposed and the exact solutions of complex potential functions, the stresses and displacements of the phonon and the phason fields, the electric displacements and the electric potential are obtained explicitly.Reducing the cavity into a crack, the explicit solutions in closed forms of electro–elastic fields,the field intensity factors and the energy release rate near the crack tip are derived.展开更多
基金Project supported by the National Key R&D Program of China(Grant Nos.2016YFB0401804,2016YFB0402203,2016YFA0301102,and 2017YFA0206400)the National Natural Science Foundation of China(Grant Nos.91850206,61535013,61137003,61321063,and 61404133)the Special Fund for Strategic Pilot Technology,Chinese Academy of Sciences(Grant Nos.XDB24010100,XDB24010200,XDB24020100,and XDB24030100)
文摘By combing artificial micro–nano structures,photonic crystals(PCs),with traditional semiconductor laser material to realize the dynamic collaborative control of photonic states and confined electrons,the band engineering of the PC has been confirmed.This brings new development space for the semiconductor laser,such as for low threshold and high efficiency.Based on a series of works by Zheng's group,this paper has reviewed kinds of PC lasers including electrical injection PC vertical cavity and lateral cavity surface-emitting lasers,and PC high beam quality lasers,to show that the PC is vital for promoting the continuous improvement of semiconductor laser performance at present and in the future.
基金supported by the National Natural Science Foundation of China (Nos.11262012, 11462020, 10761005 and 11262017)the Scientific Research Key Program of Inner Mongolia University of Technology of China (No.ZD201219)+1 种基金the Natural Science Foundation of Inner Mongolia Department of Public Education of China (No.NJZZ13037)the Inner Mongolia Natural Science Foundation of China (No.2013MS0114)
文摘Based on the fundamental equations of piezoelasticity of quasicrystal media, using the symmetry operations of point groups, the linear piezoelasticity behavior of one-dimensional（1D）hexagonal quasicrystals is investigated and the piezoelasticity problem of 1D hexagonal quasicrystals is decomposed into two uncoupled problems, i.e., the classical plane elasticity problem of conventional hexagonal crystals and the phonon–phason-electric coupling elasticity problem of1 D hexagonal quasicrystals.The final governing equations are derived for the phonon–phasonelectric coupling anti-plane elasticity of 1D hexagonal quasicrystals.The complex variable method for an anti-plane elliptical cavity in 1D hexagonal piezoelectric quasicrystals is proposed and the exact solutions of complex potential functions, the stresses and displacements of the phonon and the phason fields, the electric displacements and the electric potential are obtained explicitly.Reducing the cavity into a crack, the explicit solutions in closed forms of electro–elastic fields,the field intensity factors and the energy release rate near the crack tip are derived.
