| 摘要 |
A metafilm is provided for operating on a photon at a defined wavelength, for super-scattering, absorption, and for laser absorber switch. The metafilm includes dimers and a conductive substrate for embedding the dimers in an array. Each dimer comprises a pair of a gain element and a loss element. The substrate, and the gain and loss elements have complex permittivity values. The metafilm super-scatters (e.g., lases) the photon in response to increasing the imaginary component of either the substrate or the loss element, and absorbs the photon in response to increasing the imaginary component of the gain element. |
| 主权项 |
1. A metafilm for loss-induced super-scattering of a photon at a wavelength, comprising:
an electrically conductive substrate having a planar surface, a sub-wavelength thickness and a first complex permittivity; and a plurality of dimers disposed in a planar array on said planar surface of said substrate, each dimer having a sub-wavelength period and including loss and gain elements separated by a sub-wavelength distance, each element having a sub-wavelength span and a sub-wavelength width along said planar array, said loss element having a second complex permittivity, said gain element having a third complex permittivity, wherein said first, second and third complex permittivities respectively include first, second and third real components, and respectively include first, second and third imaginary components, said second and third real components are equal, said second imaginary component is higher than said third imaginary component, and the metafilm emits the photon in response to increasing one of said first imaginary component and said second imaginary component. |
