The effect of gain saturation in a gain compensated perfect lens
Marte P. Hatlo Andresen, Aleksander V. Skaldeb{\o}, Magnus W., Haakestad, Harald E. Krogstad, Johannes Skaar
TL;DR
This paper analyzes how gain saturation affects the performance of a gain-compensated perfect lens, revealing that while gain improves resolution, saturation introduces nonideal effects that depend on the medium's saturation constant.
Contribution
It develops a method to calculate fields in nonlinear systems considering gain saturation effects in perfect lenses.
Findings
Gain compensation enhances resolution
Gain saturation causes nonideal effects
Resolution depends on saturation constant
Abstract
The transmission of evanescent waves in a gain-compensated perfect lens is discussed. In particular, the impact of gain saturation is included in the analysis, and a method for calculating the fields of such nonlinear systems is developed. Gain compensation clearly improves the resolution; however, a number of nonideal effects arise as a result of gain saturation. The resolution associated with the lens is strongly dependent on the saturation constant of the active medium.
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