Determination of shape anisotropy in embedded low contrast submonolayer quantum dot structures

Dhomkar, S.; Vaxelaire, N.; Ji, H.; Shuvayev, V.; Tamargo, M. C.; Kuskovsky, I. L.; Noyan, I. C.

doi:10.1063/1.4938399

Title: Determination of shape anisotropy in embedded low contrast submonolayer quantum dot structures

Journal Article · Mon Dec 21 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4938399· OSTI ID:1354325

Dhomkar, S. ^[1]; Vaxelaire, N. ^[2]; Ji, H. ^[1]; Shuvayev, V. ^[3]; Tamargo, M. C. ^[4]; Kuskovsky, I. L. ^[1]; Noyan, I. C. ^[2]

Queens College of CUNY, Queens, NY (United States); CUNY, New York, NY (United States)
Columbia Univ., New York, NY (United States)
Queens College of CUNY, Queens, NY (United States)
CUNY, New York, NY (United States); City College of New York, NY (United States)

We describe a procedure for the morphological characterization of hard-to-image submonolayer quantum dot structures. This procedure employs high resolution x-ray diffraction based reciprocal space mapping, accompanied by rigorous diffraction modeling for precise determination of the morphology of submonolayer quantum dots. Our modelling results and experimental data clearly show that the investigated quantum dots are anisotropically elongated along the [110] orientation. Complementary polarization dependent photoluminescence measurements, combined with our previously reported magneto-photoluminescence data, confirm this conclusion. Here, our formalism enables direct extraction of structural information of complex embedded three-dimensional structures, which, due to their low electron density contrast with respect to the surrounding host matrix, cannot be readily investigated by traditional electron diffraction techniques.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: SC00112704; SC003739; AC02-98CH10886

OSTI ID:: 1354325

Alternate ID(s):: OSTI ID: 1234094

Report Number(s):: BNL-112841-2016-JA

Journal Information:: Applied Physics Letters, Vol. 107, Issue 25; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (28)

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71 CLASSICAL AND QUANTUM MECHANICS
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Title: Determination of shape anisotropy in embedded low contrast submonolayer quantum dot structures

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