Abstract
A novel theory of an optical amplifier device is proposed utilizing plasma resonance carried by electrons. The interaction between photons and drifting plasmons is based on a space-charge wave with longitudinal electric field components within a waveguide structure. By solving the wave equations under the waveguide constraint, it is found that within the original cutoff range, an amplifying mode appears. The operating wavelength range is the infrared one, from submillimeter to micrometer waves. Some accompanying considerations are shown for a practical realization of the devices. The present theory of the plasma interaction under a constraint is extended to various waveguide structures. Some examples of optical interconnections on LSI utilizing dielectric waveguides, including photonic bandgap devices, are described. The physical concept of this effect on the constrained plasma wave transmission is discussed from the viewpoint of the eigenvalue problem.
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