Green region stimulated emission in optically pumped InGaN/GaN MQW nanocolumn arrays of triangular lattice

In this paper, a 520-565 nm wavelength stimulated emissions were successfully obtained under room temperature optical excitation for triangular-lattice GaN based nano-column arrays, in which InGaN/GaN multiple-quantum-well (MQW) was integrated at the top of each nano-column. The GaN nano-column array was prepared with selective area growth of RF plasma assisted molecular beam epitaxy.The diameter and height of the GaN nano-columns were 100-300 nm and 0.2-2.0 μm, respectively. This experiment demonstrates prospects of GaN nanocolumns for application to green emitting devices.