Didem Dede
Postdoctoral Scholar, Materials Science and Engineering
Professional Education
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PhD, École Polytechnique Fédérale de Lausanne (EPFL), Materials Science and Engineering (2024)
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MSc, Bilkent University, National Nanotechnology Research Center, Materials Science (2018)
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BSc, Middle East Technical University, Metallurgical and Materials Engineering (2016)
All Publications
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Selective-Area Deposition of Indium and Its Plasmonic Properties
ACS APPLIED OPTICAL MATERIALS
2025
View details for DOI 10.1021/acsaom.5c00373
View details for Web of Science ID 001635397500001
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Multi-<i>V<sub>T</sub></i> in Oxide--Semiconductor Transistors Leveraging Sub-1-nm Dipoles for Low-Refresh Energy Gain Cell Memory
IEEE TRANSACTIONS ON ELECTRON DEVICES
2025
View details for DOI 10.1109/TED.2025.3616087
View details for Web of Science ID 001600834500001
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Single Photon Emitters in Thin GaAsN Nanowire Tubes Grown on Si
ACS NANO
2025
Abstract
III-V nanowire heterostructures can act as sources of single and entangled photons and are enabling technologies for on-chip applications in future quantum photonic devices. The peculiar geometry of nanowires allows to integrate lattice-mismatched components beyond the limits of planar epilayers and to create radially and axially confined quantum structures. Here, we report the plasma-assisted molecular beam epitaxy growth of thin GaAs/GaAsN/GaAs core-multishell nanowires monolithically integrated on Si (111) substrates, overcoming the challenges caused by the low solubility of N and a high lattice mismatch. The nanowires have a GaAsN shell of 10 nm containing 2.7% N, which reduces the GaAs bandgap drastically by 400 meV. They have a symmetric core-shell structure with sharp boundaries and a defect-free zincblende phase. The high structural quality reflects in their excellent optical properties. Local N% fluctuations and radial confinement give rise to quantum dot-like states in the thin GaAsN shell, which display remarkable single photon emission with a second-order autocorrelation function at zero time delay as low as 0.05 in continuous and in pulsed excitation.
View details for DOI 10.1021/acsnano.5c12139
View details for Web of Science ID 001599142300001
View details for PubMedID 41128262
https://orcid.org/0000-0002-9158-8764