Results 131 to 140 of about 2,529,540 (368)
ACS Nano, 2017 Here we report the fabrication of high-performance ultraviolet photodetectors based on a heterojunction device structure in which ZnO quantum dots were used to decorate Zn2SnO4 nanowires. Systematic investigations have shown their ultrahigh light-to-dark
Ludong Li +4 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.This work investigates modifying interfacial contacts in realizing giant‐performance semiconductor nanomembrane optoelectronics. Strategies, including surface reaction and buffer layer work‐function modulation, are explored to boost the Schottky barrier. An emerging material of YbOx is utilized for near‐ideal Ohmic contact.
Yibo Zhang +5 more
wiley +1 more source
Maximum entanglement of quantum-dot systems with single excitation in the spin van der Waals model [PDF]
arXiv, 2001 Time evolution of entanglement of N quantum dots is analyzed within the spin-1/2 van der Waals (or Lipkin-Meshkov-Glick) XY model. It is shown that, for a single dot initially excited and disentangled from the remaining unexcited dots, the maximum bipartite entanglement can be obtained in the systems of N=2,...,6 dots only.
arxiv
Advanced Functional Materials, EarlyView.Intercalation of a series of FeSe1−xSx host crystals with tetramethylammonium cations (TMA+) linearly scales the critical temperature Tc from 43 K down to 28 K with increasing sulfur incorporation. The chemical pressure induced by the partial substitution shows a weakening of the superconducting properties in both hosts and intercalates in a remarkably
Nadine Lammer +3 more
wiley +1 more source
Josephson Current through a Quantum Dot Connected with Superconducting Leads
Advances in Condensed Matter Physics, 2019 In this study, we consider the Josephson current in a system composed of a superconductor/quantum dot/superconductor junction. In the model, the Coulomb interaction in the quantum dot is taken into consideration, and the Lacroix approximation is applied ...
Satoshi Kawaguchi
doaj +1 more source
Unlocking Spectral Versatility from Broadly−Tunable Quantum−Dot Lasers
Photonics, 2015 Wavelength−tunable semiconductor quantum−dot lasers have achieved impressive performance in terms of high−power, broad tunability, low threshold current, as well as broadly tunable generation of ultrashort pulses.
Stephanie E. White, Maria Ana Cataluna
doaj +1 more source
Fast control of quantum states in quantum dots: limits due to decoherence [PDF]
arXiv, 2003 We study the kinetics of confined carrier-phonon system in a quantum dot under fast optical driving and discuss the resulting limitations to fast coherent control over the quantum state in such systems.
arxiv
Advanced Functional Materials, EarlyView.This review synthesizes the evolution of radiative heat transfer, emphasizing the transition from far‐field to near‐field regimes. Traditional frameworks, such as Planck's law, are revisited alongside modern innovations like fluctuational electrodynamics. Applications span nanoscale thermal management, energy harvesting, and thermophotovoltaic systems.
Ambali Alade Odebowale +6 more
wiley +1 more source
Scalable Quantum Computing with "Enhancement" Quantum Dots [PDF]
arXiv, 2005 We propose a novel scheme of solid state realization of a quantum computer based on single spin "enhancement mode" quantum dots as building blocks. In the enhancement quantum dots, just one electron can be brought into initially empty dot, in contrast to depletion mode dots based on expelling of electrons from multi-electron dots by gates.
arxiv
Analytical formalism for determining quantum-wire and quantum-dot band structure in the multiband envelope-function approximation [PDF]
, 1990 Peter C. Sercel, Kerry J. Vahala
openalex +1 more source