  The plasmonic structures exhibiting narrowband resonances (NBR) are of a
great interest for various applications. We propose to use hysteresis behavior
in a 1D system of nonlinear nanoresonators in order to achieve the NRB; the
nonlinearity is provided by saturation of a two-level quantum system coupled
with the nanoresonators (nanolaser/spaser configuration). Quantum Dots (QD)
were assumed as quantum systems; their numerical parameters have been adopted
for estimations. Role of the loss compensation on the quality of the NBR is
shown for below (under compensation) and above threshold (generating spasers)
operation modes. Amplitude and phase detection schemes of the prospective
experimental realization are compared using the developed model. Possible
sensor oriented applications of the proposed system are discussed.
