Gallardo E, Martínez L J, Nowak A K, van der Meulen H P, Calleja J M, Tejedor C, Prieto I, Granados D, Taboada A G, García J M, Postigo P A
Departamento de Física de Materiales, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Opt Express. 2010 Jun 7;18(12):13301-8. doi: 10.1364/OE.18.013301.
We study the optical emission of single semiconductor quantum dots weakly coupled to a photonic-crystal micro-cavity. The linearly polarized emission of a selected quantum dot changes continuously its polarization angle, from nearly perpendicular to the cavity mode polarization at large detuning, to parallel at zero detuning, and reversing sign for negative detuning. The linear polarization rotation is qualitatively interpreted in terms of the detuning dependent mixing of the quantum dot and cavity states. The present result is relevant to achieve continuous control of the linear polarization in single photon emitters.
我们研究了与光子晶体微腔弱耦合的单个半导体量子点的光发射。所选量子点的线偏振发射会连续改变其偏振角，从大失谐时几乎垂直于腔模偏振，到零失谐时平行，并且在负失谐时符号反转。线性偏振旋转可以根据量子点和腔态的失谐相关混合进行定性解释。目前的结果对于实现单光子发射器中线性偏振的连续控制具有重要意义。
