Single-photon Sources And Coherent Phonon Devices Based On The Modulation Of Stark Effect

The Stark effect is the shifting and splitting of spectral lines of atoms and molecules due to presence of an external electric field.The splitting of the energy level due to the Stark effect can have important impact on many devices.The present paper mainly studies how to use the Stark effect to optimize two kinds of devices,single-photon sources and Superlattice Sasers.This paper mainly covers the following two parts of the research content.The first one is the optimizing of single-photon sources based on Stark effect.Recently,quantum optics has been widely used in the field of quantum communication,quantum computation,quantum storage,etc.And single-photon source is an important device for the study of quantum optics.With the development of the research,single-photon source needs to be high efficient,high speed,high indistinguishability and high brightness.So numerous of studies of single-photon source have been carried out.In these studies,it is found that semiconductor quantum dots(QDs)is the ideal medium for study of single-photon sources.However,due to the charge noise on the surface of the device,the indistinguishability is still a problem.So we design and fabricate a new device with new structure in order to limit the charge noise.And at the same time,the use of optical microstructure can optimize the brightness of the single-photon source.The second one is the study of Superlattice Sasers based on Stark effect.The sasers based on the semiconductor superlattice can emit strongly coherent phonon at THz.The sources of phonon like that can be widely used in the field of detecting in nanometer resolution,imaging of structure and device in nanoscale,underwater communicating,etc.This paper studies how to use the Stark effect to control electronic band structure in order to design and realize the sasers,mainly including the study about generation and amplification of phonon.We analysis the spectrum for phonon vertical transition in superlattice by using Mathcad and supply a feasible method for the further study about resonant cavity.The results show that the single-photon sources based on Stark effect can be optimized by a symmetric electrode structure with circinal micropillar cavity and fabricated by E-beam and conventional semiconductor luminescent devices craft,and the high reflection mirror in sasers can be realized by superlattice structure for which multiple phonon frequency zone of high reflection can be realized by adjusting the thickness of superlattice components proved via theoretical simulation.