title: Quantum confined Stark effect of InGaN/GaN multi-quantum disks grown on top of GaN nanorods.
abstract: We have investigated, using micro-photoluminescence, the quantum confined Stark effect in an In(x)Ga(1-x)N/GaN multi-quantum disk structure at the tip of a single GaN nanorod. A strong and sharp emission line from the In(x)Ga(1-x)N/GaN quantum disks near 3.26 eV was observed. The peak energy of the emission line was observed to blue-shift with increasing excitation power, indicating a quantum confined Stark effect. Furthermore, both the blue-shift and the intensity of the emission saturate with increasing excitation power. The temperature-dependence of the 3.26 eV emission line has also been investigated.
authors.affiliation: Quantum Functional Semiconductor Research Center, Department of Physics, Dongguk University, Seoul, Korea.
authors.forename: Young S
authors.initials: YS
authors.lastname: Park
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Holmes
authors.forename: Tae W
authors.initials: TW
authors.lastname: Kang
authors.forename: Robert A
authors.initials: RA
authors.lastname: Taylor