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Transmission X-ray Microscopy (TXM) is a powerful technique with a theoretical resolution down to 30 nm that can be used to fill the mesoscale gap between the atomic scale resolution of atom probe tomography (APT) and macroscale resolution of energy dispersive spectroscopy (EDS). For this study, thin film solar cells based on Cu2ZnSnSe4 (CZTSe) absorber layers with Zn/Sn ratios of 1.0 and 1.4 were...
Pulsed magnets were characterized as injection in the top-up mode for Taiwan Photon Source (TPS). Two in vacuum kicker magnets were exhibited to inject and extract electron beams for the booster ring. Besides, five septum and four kicker magnets of type in air were provided for injection into 3-GeV storage ring. All the pulsed magnets are of home design, manufacture and self-assembly at NSRRC. To...
Microdisk lasers with active region made of type II GaSb/GaAs quantum dots on the GaAs substrate have been demonstrated. Lasing wavelengths near 1μm was achieved and longer photon lifetime from type II structure also observed.
A photonic crystal is an artificially engineered, periodic structure that offers new optical properties and functionalities. A more generalized class of an artificial material may not be perfectly periodic and still offers unique photonic characteristics- architectural network of nanomaterials. I will describe, here, a random network of nanostructure for maximizing the solar absorption and a non-periodic...
The refractive indices of (Al0.48In0.52As)z(Ga0.47In0.53As)1-z, and GaxIn1-xAsyP1-y quaternary materials is presented from a model that takes into account of band-to-band Coulomb interaction and Urbach broadening. We apply an accurate absorption model to calculate the contribution near band-edge region by a complete closed-form Kramers-Kronig transform. A Sellmeier-type single-oscillator model includes...
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