Lasing and mode switching in circular Bragg nanoresonators

Abstract

We demonstrate low-threshold lasing at telecommunications wavelengths from high quality circular semiconductor nanoresonators employing radial Bragg reflector. Single-mode emission and mode switching are observed at room temperature under optical pumping. 02005 Optical Society ofAmerica

Simple Route to Gradient Concentric Metal and Metal Oxide Rings

“…However, to the best of our knowledge, no well-ordered concentric rings (i.e., multi-rings) based on metal and metal oxide have been reported. The rings organized in a concentric mode many offer possibilities for many applications, including annular Bragg resonators for advanced optical communications systems …”

“…The rings organized in a concentric mode many offer possibilities for many applications, including annular Bragg resonators for advanced optical communications systems. 13 Herein, we report on a simple route to concentric rings of metals or metal oxide. The gradient concentric polymer rings with unprecedented regularity were self-organized on metal-(or metal oxide-) coated Si substrate via the evaporationinduced dynamic self-assembly of polymer in a confined geometry (Figure 1a).…”