Orbital angular momentum induced asymmetric diffraction grating in quantum dot molecule. (1st May 2023)

• Record Type: Journal Article
• Authors: Wang, Weiyong; Niu, Fanfan; Qiao, Na
• Is Part Of: Laser physics letters. Volume 20:Number 5(2023)
• Publication Date: 2023-05-01
• Subjects: orbital angular momentum -- relative phase -- asymmetric diffraction pattern; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/acca12
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: In this paper, we study the Fraunhofer diffraction pattern in a four-level quantum dot nanostructure. The quantum dot interacts with two weak probe and signal laser fields and two strong coupling lights where one of them is a two-dimensional standing wave field. We study the Fraunhofer diffraction pattern of the transmitted probe light when the coherent driving light becomes plan wave or Laguerre Gaussian (LG) vortex light. We found that by controlling the relative phase of the applied lights and orbital angular momentum (OAM) of LG light, the Fraunhofer diffraction pattern can be controlled and the probe energy transfer from zero order to the higher orders, respectively. Moreover, we realized that by controlling the OAM number of the vortex light the asymmetric diffraction pattern is possible.