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Strain distribution in bent ZnO microwires
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View: Figures


Image of FIG. 1.
FIG. 1.

Composed optical microscopic image of a bent ZnO microwire with diameter . The minimum radius of curvature is . Inset, top view: SEM image of a bent ZnO microwire with .

Image of FIG. 2.
FIG. 2.

Low-temperature PL line scans of a ZnO microwire with (a) before and (b) after bending, respectively. The center of the wire (neutral fiber) is set as zero for the position axis. The most prominent recombination peaks (indicated by vertical dotted lines) as well as appearing WGMs are labeled for the unbent microwire. The edges of the microwire are highlighted by solid lines.

Image of FIG. 3.
FIG. 3.

Shift of free A-exciton emission energy vs strain at low temperatures . The solid line represents a linear least-squares fit to the experimental data from six microwires with a slope of . Error bars are smaller than the symbol size. Values from Rowe et al. (Ref. 16) recalculated for according to Eq. (2) and elastic constants from Ref. 25 are given for comparison as red circles.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strain distribution in bent ZnO microwires