NOVELTY - Emitter device (10) comprises metallic patterned structure, and emitting media (14) which is integral with metallic patterned structure, where emitting media comprises at least one emitter of omni-directional emission in nature where certain emission pattern, and at least one parameter of metallic patterned structure defining dispersion map that are selected according to emitting pattern of emitting media so that metallic patterned structure operates as beam shaper creating resonant coupling of emitter of emitting media with microscopic confined optical mode of metallic patterned structure.    USE - The emitter device is useful for emitting electromagnetic radiation, in system (all claimed) and in active optical devices.    ADVANTAGE - The emitter exhibits enhanced predetermined enhancement factor and predetermined directional beaming of output electromagnetic radiation.    DETAILED DESCRIPTION - Emitter device (10) comprises a metallic patterned structure, and emitting media (14) which is integral with the metallic patterned structure, where the emitting media comprises at least one emitter of omni-directional emission in nature where certain emission pattern, and at least one parameter of the metallic patterned structure defining a dispersion map of it which are selected according to the emitting pattern of the emitting media so that the metallic patterned structure operates as a beam shaper creating resonant coupling of each of the emitter of the emitting media with a microscopic confined optical mode of the metallic patterned structure thus enhancing a predetermined enhancement factor of the emission from the emitting media in a predetermined direction and the device thus providing predetermined directional beaming of output electromagnetic radiation characterized by a predetermined angular propagation of the electromagnetic radiation emitted by the emitting media. INDEPENDENT CLAIMS are also included for:    (1) providing predetermined directional beaming of electromagnetic radiation having a predetermined angular propagation of the electromagnetic radiation, comprising selecting emitting media formed by the emitter of omni-directional emission in nature having a predetermined emitting pattern, providing the metallic patterned structure of a predetermined dispersion map selected in accordance with the emitting pattern, and integrating the emitting media in the metallic patterned structure, thus creating resonant coupling of each of the emitter of the emitting media with a microscopic confined optical mode of the metallic patterned structure thus enhancing a predetermined enhancement factor the emission from the emitting media in a predetermined direction and angular distribution;    (2) an emitter device for directional emission of electromagnetic radiation propagating in a predetermined direction and a predetermined angular distribution, comprising emitting media for emitting electromagnetic radiation with a certain emitting pattern, where the emitting media comprises at least one emitters each of omni-directional emission in nature embedded in a metallic patterned structure, the metallic pattern structure has a predetermined dispersion map selected according to the emitting pattern of the emitting media so that each of the emitter of the emitting media is in resonant coupling with a microscopic confined optical mode of the metallic patterned structure, a device output being formed by the electromagnetic radiation propagating with the predetermined direction and the predetermined angular distribution;    (3) an emitter device comprising emitting media for emitting electromagnetic radiation with a certain emitting pattern, where the emitting media comprises the emitter each of omni-directional emission in nature embedded in a metallic patterned structure, where the metallic pattern structure has a predetermined dispersion map selected according to the emitting pattern of the emitting media to provide beam shaping to radiation being emitted where at least one polarized emission of the emitting media having different general direction of propagation and angular distribution for transverse electric (TE) and transverse magnetic (TM) polarization modes, altering spontaneous emission rate of the emitting media, and a desired number of photons in an output beam of the device; and    (4) a system for generating electromagnetic radiation, comprising the emitter device and an exciting unit configured and operable for exciting the emitting media in the emitter device to emit electromagnetic radiation with a certain emitting pattern.    DESCRIPTION OF DRAWING(S) - The figure shows the configuration of a directional emitter device.    Emitter device (10)    Nanoslit array structure (12)    Emitter media (14)    Dielectric structure (16)    Substrate (18)