Based on the ABCD matrix formalism,the propagation property of an Airy beam from right-handed material（RHM） to left-handed material（LHM） is investigated.The result shows that when the Airy beam propagates in the L...Based on the ABCD matrix formalism,the propagation property of an Airy beam from right-handed material（RHM） to left-handed material（LHM） is investigated.The result shows that when the Airy beam propagates in the LHM,the intensity self-bending due to its propagation in the RHM can be compensated.In particular,if the propagation distance in the RHM is equal to that in the LHM and the refractive index of the LHM is n L =-1,the transverse intensity distribution of the Airy beam can return to its original state.展开更多
In this paper a comprehensive framework for treating the nonlinear propagation of ultrashort pulse in metamaterial with dispersive dielectric susceptibility and magnetic permeability is presented. Under the slowly-evo...In this paper a comprehensive framework for treating the nonlinear propagation of ultrashort pulse in metamaterial with dispersive dielectric susceptibility and magnetic permeability is presented. Under the slowly-evolving-wave approximation, a generalized （3＋1）-dimensional wave equation first order in the propagation coordinate and suitable for both right-handed material （I^HM） and left-handed material （LHM） is derived. By the commonly used Drude dispersive model for LHM, a （3＋1）-dimensional nonlinear Schrodinger equation describing ultrashort pulsed beam propagation in LHM is obtained, and its difference from that for conventional RHM is discussed. Particularly, the self-steeping effect of ultrashort pulse is found to be anomalous in LHM.展开更多
在谐振腔设计过程中,谐振腔的品质因数以及谐振频率都是需要考虑的关键因素.传统的方法是通过减小谐振腔的尺寸或者利用高次模来提高谐振腔的谐振频率,但是由于两种方法都有其局限性,导致设计结果并不理想.通过理论计算与模拟仿真相结...在谐振腔设计过程中,谐振腔的品质因数以及谐振频率都是需要考虑的关键因素.传统的方法是通过减小谐振腔的尺寸或者利用高次模来提高谐振腔的谐振频率,但是由于两种方法都有其局限性,导致设计结果并不理想.通过理论计算与模拟仿真相结合的方法,对影响谐振腔谐振频率的因素进行分析,得出了填充介质的材料属性与谐振腔谐振频率的关系.理论计算显示:当用"左手介质"作为谐振腔的填充物质时,可以在不改变谐振腔尺寸的基础上提高谐振频率.高频结构仿真器(high frequency structure simulator)的仿真数据也证明了以上结果,从而得出谐振腔的谐振频率可以不受谐振腔尺寸的限制.相较于传统理论而言,研究结论有进一步的发展,为探索和设计新颖的谐振腔提供了理论依据.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 60977068,61178015 and 11102100)the Youth Foundation of Sanming University,China (Grant No. B201008/Q)
文摘Based on the ABCD matrix formalism,the propagation property of an Airy beam from right-handed material（RHM） to left-handed material（LHM） is investigated.The result shows that when the Airy beam propagates in the LHM,the intensity self-bending due to its propagation in the RHM can be compensated.In particular,if the propagation distance in the RHM is equal to that in the LHM and the refractive index of the LHM is n L =-1,the transverse intensity distribution of the Airy beam can return to its original state.
基金Supported by the National Natural Science Foundation of China （Grant Nos 10576012 and 60538010）, the Program for New Century Excellent Talents in University and the Specialized Research Fund for the Doctoral Program of Higher Education of China （Grant No 20040532005）.
文摘In this paper a comprehensive framework for treating the nonlinear propagation of ultrashort pulse in metamaterial with dispersive dielectric susceptibility and magnetic permeability is presented. Under the slowly-evolving-wave approximation, a generalized （3＋1）-dimensional wave equation first order in the propagation coordinate and suitable for both right-handed material （I^HM） and left-handed material （LHM） is derived. By the commonly used Drude dispersive model for LHM, a （3＋1）-dimensional nonlinear Schrodinger equation describing ultrashort pulsed beam propagation in LHM is obtained, and its difference from that for conventional RHM is discussed. Particularly, the self-steeping effect of ultrashort pulse is found to be anomalous in LHM.
文摘在谐振腔设计过程中,谐振腔的品质因数以及谐振频率都是需要考虑的关键因素.传统的方法是通过减小谐振腔的尺寸或者利用高次模来提高谐振腔的谐振频率,但是由于两种方法都有其局限性,导致设计结果并不理想.通过理论计算与模拟仿真相结合的方法,对影响谐振腔谐振频率的因素进行分析,得出了填充介质的材料属性与谐振腔谐振频率的关系.理论计算显示:当用"左手介质"作为谐振腔的填充物质时,可以在不改变谐振腔尺寸的基础上提高谐振频率.高频结构仿真器(high frequency structure simulator)的仿真数据也证明了以上结果,从而得出谐振腔的谐振频率可以不受谐振腔尺寸的限制.相较于传统理论而言,研究结论有进一步的发展,为探索和设计新颖的谐振腔提供了理论依据.
