Optical properties of GaN nanorods containing a single or multiple InGaN quantum wells

Zhuang, Yi D. and Lis, Szymon and Bruckbauer, Jochen and O'Kane, Simon E. J. and Shields, Philip A. and Edwards, Paul R. and Sarma, Jayanta and Martin, Robert W. and Allsopp, Duncan W. E. (2013) Optical properties of GaN nanorods containing a single or multiple InGaN quantum wells. Japanese Journal of Applied Physics, 52. 08JE11.

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    Abstract

    Measurements of light emission from GaN nanorods of diameter between 80 and 350 nm, containing either a three-well multiple InGaN quantum well or a single quantum well, have been performed by photoluminescence (PL) and cathodoluminescence (CL) hyperspectral imaging. The PL underwent a Stark shift to the blue as the nanorod diameter was reduced, indicating substantial relaxation of the compressive strain in the quantum wells. The intensity of the nanorod emission per unit area can exceed that of the planar starting material. The CL measurements revealed that the wavelength of the quantum well emission varied with radial position in the nanorod. Simulations by a modal expansion method revealed that the light extraction efficiency varies with radial position and the variation is dependent on nanorod diameter. Finite difference time domain simulations showed that Bloch mode formation in the buffer layer below the nanorods impacts on the light extraction.

    Author(s):Zhuang, Yi D., Lis, Szymon, Bruckbauer, Jochen ORCID logoORCID: https://orcid.org/0000-0001-9236-9320, O'Kane, Simon E. J., Shields, Philip A., Edwards, Paul R. ORCID logoORCID: https://orcid.org/0000-0001-7671-7698, Sarma, Jayanta, Martin, Robert W. ORCID logoORCID: https://orcid.org/0000-0002-6119-764X and Allsopp, Duncan W. E.
    Item type:Article
    ID code:43862
    Keywords:optical properties, GaN nanorods, InGaN quantum wells, photoluminescence , cathodoluminescence, Physics, Atomic and Molecular Physics, and Optics
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Technology and Innovation Centre > Bionanotechnology
    Technology and Innovation Centre > Photonics
    Depositing user: Pure Administrator
    Date deposited:21 May 2013 09:08
    Last modified:20 Nov 2019 08:53
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/43862
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