Controlling the spontaneous emission of a quantum emitter in an elliptically polarized field

Modification of the spontaneous emission of a multilevel quantum emitter driven by an elliptically polarized control field in the vicinity of the photonic crystal (PC) is investigated in detail. It is shown that one can control the spectral response by altering several key parameters: (i) the rotation polarization angle, (ii) the position-dependent angle parameter, and (iii) the emitter's location around the PC, respectively. These parameters affect the polarization of the control field and the coupling strength between the emitter and the PC, which leads to modification of the emission spectra of the emitter. A few interesting phenomena such as multipeak structure, enhanced ultranarrow spectral line, as well as the splitting and merging of spectral lines can be observed by adjusting these parameters. Moreover, control over the emission spectra by varying these angle parameters can provide more degrees of freedom and may offer an emitter with any desired spectral behavior. (C) 2013 Optical Society of America