3D Strain Imaging of a Heterostructured GaInP/InP Nanowire Using Bragg Coherent Diffraction X-ray Imaging: Implications for Optoelectronic Devices.

ABSTRACT: Imaging the strain in nanoscale heterostructures is challenging since it requires a combination of high strain sensitivity and spatial resolution. Here, we show that three-dimensional (3D) Bragg coherent diffraction imaging (BCDI) can be used to image the strain in a single InP segment within an axially heterostructured GaInP-InP nanowire. We use a 350 nm-diameter X-ray beam, which is smaller than the nanowire but larger than the 180 nm long InP segment. The intense nanofocused beam induced angular distortions, but these are successfully removed by a correction algorithm. Additionally, we show that data from multiple scans can be merged despite scan-to-scan variations. The reconstruction of the merged data set has a spatial resolution of approximately 14 nm, revealing the 3D morphology of

SUBMITTER: Chen H 

PROVIDER: S-EPMC11811927 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature