Semiconductor quantum dots(QDs)have been demonstrated viable for efficient light emission applications,in particular for the emission of single photons on demand.However,the preparation of QDs emitting photons with pr...Semiconductor quantum dots(QDs)have been demonstrated viable for efficient light emission applications,in particular for the emission of single photons on demand.However,the preparation of QDs emitting photons with predefined and deterministic polarization vectors has proven arduous.Access to linearly polarized photons is essential for various applications.In this report,a novel concept to directly generate linearly-polarized photons is presented.This concept is based on InGaN QDs grown on top of elongated GaN hexagonal pyramids,by which the predefined elongation determines the polarization vectors of the emitted photons from the QDs.This growth scheme should allow fabrication of ultracompact arrays of photon emitters,with a controlled polarization direction for each individual emitter.展开更多
基金This work was mainly supported by the Nano-N consortium funded by the Swedish Foundation for Strategic ResearchWe also acknowledge support from the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University(Faculty Grant SFO-Mat-LiU#2009-00971)grants from the Swedish Research Council(VR)and the Knut and Alice Wallenberg Foundation.
文摘Semiconductor quantum dots(QDs)have been demonstrated viable for efficient light emission applications,in particular for the emission of single photons on demand.However,the preparation of QDs emitting photons with predefined and deterministic polarization vectors has proven arduous.Access to linearly polarized photons is essential for various applications.In this report,a novel concept to directly generate linearly-polarized photons is presented.This concept is based on InGaN QDs grown on top of elongated GaN hexagonal pyramids,by which the predefined elongation determines the polarization vectors of the emitted photons from the QDs.This growth scheme should allow fabrication of ultracompact arrays of photon emitters,with a controlled polarization direction for each individual emitter.
