Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 Jul 24;7:6205. doi: 10.1038/s41598-017-06566-5

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Finite-Difference Time-Domain simulations of the optical properties of a circular grating cavity containing a quantum dot and a crater-like feature close to its center. (a): Geometry of the simulated sample: the quantum dot (blue sphere) is positioned in the center of the circular grating structure. The center position of the half-ellipsoidal crater, used to depict a surface morphological (crater-like) feature, is fixed at a position x = 75 nm, y = 0 nm, z = 95 nm with respect to the QD. The crater width w is kept fixed at 125 nm, while the crater length l and crater height h have a fixed aspect ratio of 5:1, with the length l varying between 125 nm and 500 nm. The leftmost point (crater length = 0) corresponds to the circular grating structure in absence of a crater. Finite-difference time-domain simulations of the circular grating cavity wavelength (panel (b)), the Purcell factor F _p (panel (c)) and collection efficiency of the QD emission into objectives with different numerical aperture (NA) (panel (d)), plotted as a function of crater length.