We revisit the electrodynamics of resonant high-Q interactions in atomic systems with a view to gaining insights into the design of meta-atoms and hence bulk metamaterials with profoundly different electromagnetic res...We revisit the electrodynamics of resonant high-Q interactions in atomic systems with a view to gaining insights into the design of meta-atoms and hence bulk metamaterials with profoundly different electromagnetic responses.The relevance of phase coherence and nonlinearity in charged systems is emphasized,as is the need to take care over defining how one specifies effective boundaries and cavities that ultimately determine light–matter interactions.Radically new material properties become apparent once one designs organized clusters of small numbers of atoms or meta-atoms for which the usually applied random phase approximation(RPA)does not apply.The RPA relies on averages in sufficiently large volumes consisting of large numbers of interacting systems,while our model assumes a small volume with averages in time,i.e.,ergodicity.New meaning is given to the concept of effective and practically useful constitutive parameters,based on this very fundamental point of view,which is important to metamaterials.展开更多
It has been two years and eight months since the first issue of Photonics Research was published in June 2013.During that time,the photonics and optics community has progressed on many fronts,as has the journal.Advanc...It has been two years and eight months since the first issue of Photonics Research was published in June 2013.During that time,the photonics and optics community has progressed on many fronts,as has the journal.Advances have been reported in lasers,microring resonators,nanowaveguide properties,nano-optics,ultrafast optics,metamaterials,and nonlinear optics,to name but a few that continue to push forward the boundaries of photonics and optics research.In 2014,展开更多
文摘We revisit the electrodynamics of resonant high-Q interactions in atomic systems with a view to gaining insights into the design of meta-atoms and hence bulk metamaterials with profoundly different electromagnetic responses.The relevance of phase coherence and nonlinearity in charged systems is emphasized,as is the need to take care over defining how one specifies effective boundaries and cavities that ultimately determine light–matter interactions.Radically new material properties become apparent once one designs organized clusters of small numbers of atoms or meta-atoms for which the usually applied random phase approximation(RPA)does not apply.The RPA relies on averages in sufficiently large volumes consisting of large numbers of interacting systems,while our model assumes a small volume with averages in time,i.e.,ergodicity.New meaning is given to the concept of effective and practically useful constitutive parameters,based on this very fundamental point of view,which is important to metamaterials.
文摘It has been two years and eight months since the first issue of Photonics Research was published in June 2013.During that time,the photonics and optics community has progressed on many fronts,as has the journal.Advances have been reported in lasers,microring resonators,nanowaveguide properties,nano-optics,ultrafast optics,metamaterials,and nonlinear optics,to name but a few that continue to push forward the boundaries of photonics and optics research.In 2014,
