Spontaneous polarization field in polar and nonpolar GaInN/GaN quantum well structures | Zendy

Thomsen M. | Zendy; Jönen H. | Zendy; Rossow U. | Zendy; Hangleiter A. | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Spontaneous polarization field in polar and nonpolar GaInN/GaN quantum well structures

Author(s) -

Thomsen M.,

Jönen H.,

Rossow U.,

Hangleiter A.

Publication year - 2011

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.201046337

Subject(s) - cathodoluminescence , quantum well , polar , blueshift , polarization (electrochemistry) , materials science , condensed matter physics , emission intensity , wide bandgap semiconductor , atomic physics , chemistry , optoelectronics , optics , physics , luminescence , photoluminescence , laser , astronomy

We present a UHV cathodoluminescence study of the spontaneous polarization field in polar [0001] and nonpolar $[1{\bar {1}}00]$ GaN/GaInN single quantum well structures. Employing electron‐stimulated desorption a descreening of the spontaneous field in the polar c ‐plane samples was observed, which counteracts the piezoelectric field in the quantum well. While in c ‐plane samples a strong blueshift of the emission energy takes place and a drastic increase of emission intensity occurs, no change of the QW emission energy and intensity from m ‐plane samples was detected. The different behaviour under the same experimental conditions can only be explained with the absence of the spontaneous polarization field in the nonpolar $[1{\bar {1}}00]$ m ‐direction.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research