Results 1 to 10 of about 610,596 (220)
Group-velocity slowdown in quantum-dots and quantum-dot molecules [PDF]
SPIE Proceedings, 2014 We investigate theoretically the slowdown of optical pulses due to quantum-coherence effects in InGaAs-based quantum dots and quantum dot molecules. Simple models for the electronic structure of quantum dots and, in particular, quantum-dot molecules are described and calibrated using numerical simulations.
Hans Christian Schneider +2 more
arxiv +6 more sources
Towards non-blinking and photostable perovskite quantum dots [PDF]
Nature CommunicationsSurface defect-induced photoluminescence blinking and photodarkening are ubiquitous in lead halide perovskite quantum dots. Despite efforts to stabilize the surface by chemically engineering ligand binding moieties, blinking accompanied by ...
Chenjia Mi +11 more
doaj +2 more sources
Coupled quantum dots as quantum gates [PDF]
Physical Review B, 1999 We consider a new quantum gate mechanism based on electron spins in coupled semiconductor quantum dots. Such gates provide a general source of spin entanglement and can be used for quantum computers. We determine the exchange coupling J in the effective Heisenberg model as a function of magnetic (B) and electric fields, and of the inter-dot distance (a)
Guido Burkard +2 more
openalex +6 more sources
Quantum teleportation with imperfect quantum dots [PDF]
npj Quantum Information, 2021 AbstractEfficient all-photonic quantum teleportation requires fast and deterministic sources of highly indistinguishable and entangled photons. Solid-state-based quantum emitters—notably semiconductor quantum dots—are a promising candidate for the role.
Val Zwiller +11 more
openaire +4 more sources
Optimization of quantum dots for solar cell applications [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2021 The quantum dots-sensitized solar cells (QDSSC) provide an alternative concept to present day photovoltaic devices. Cadmium sulfide/Zinc sulfide-sensitized solar cells have been synthesized by chemical bath deposition, based on an aqueous medium ...
Lekshmi Gangadhar, P. K Praseetha
doaj +1 more source
Chemosensors, 2023 Quantum dots nanomaterials have attracted extensive interest for fluorescence chemical sensors due their attributes, such as excellent optical characteristics, quantum size effects, interface effects, etc. Moreover, the fluorescence properties of quantum
Zhezhe Wang +4 more
doaj +1 more source
Size and Shape Effects of Silicon Quantum Dot Cohesive Energy
Taiyuan Ligong Daxue xuebao, 2023 Purposes It aims to analyze the effect of the size and shape of silicon quantum dots on their binding energy. Methods The cohesive energy of silicon quantum dots with different sizes and shapes is calculated by using the method of density functional ...
Xiangsen LUAN, Xiaoli YAN, Hui LI
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Quantum Dots and Applications [PDF]
Materials, 2020 It is the unique size-dependent band gap of quantum dots (QDs) that makes them so special in various applications. They have attracted great interest, especially in optoelectronic fields such as light emitting diodes and photovoltaic cells, because their photoluminescent characteristics can be significantly improved via optimization of the processes by
Chang-Yeol Han +2 more
openaire +2 more sources
Carbon Quantum Dots Derived from Different Carbon Sources for Antibacterial Applications
Antibiotics, 2021 Nanoparticles possess unique features due to their small size and can be composed of different surface chemistries. Carbon quantum dots possess several unique physico-chemical and antibacterial activities.
Yanyan Wu +4 more
doaj +1 more source
Optical Gain of Vertically Coupled Cd0.6Zn0.4Te/ZnTe Quantum Dots
Nanomaterials, 2023 The optical modal gain of Cd0.6Zn0.4Te/ZnTe double quantum dots was measured using a variable stripe length method, where large and small quantum dots are separated with a ZnTe layer.
Ming Mei +6 more
doaj +1 more source