Abstract
We solve numerically the three-dimensional vector form of Maxwell’s equation for the situation of near-field excitation and collection of luminescence from a single quantum dot using a scanning near-field optical fiber probe with sub-wavelength resolution. Applying a finite-difference time-domain method, we calculate the complete vector fields emerging from a realistic probe structure, as well as the near-field luminescence image of the dot captured by the same probe. We show that a collimating effect in the high index semiconductor significantly improves the spatial resolution in excitation/collection mode. We find that the spatial resolution, image shape, and collection efficiency of near-field luminescence strongly depend on the orientation of the radiating dipole in the dot.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
