Lighting of a monochromatic scatterer with virtual gain

Abstract In this work, we discuss the scattering features of a dipolar particle made large refractive index material by employing concept virtual gain and loss. The loss can be achieved in lossless passive nanostructure shaping temporal waveform incident signals complex frequency plane. We show that an appropriate tuning excitation time impinging field allows to capture release electromagnetic energy on-demand for arbitrary scale nanosphere. Thus, nanosphere obliges emit monochromatic magnetic light which tuned throughout whole visible spectrum varying size This proposal may find fruitful applications lab-on-a-chip technologies realization sectoral multipole source with quality factor at nanoscale level.