Sökning: "planar quantum dots"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden planar quantum dots.

1. 1. Quantum and Ballistic Nanodevices

   Författare :Ivan Shorubalko; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; III-V semiconductors; low-dimensional structures; nanostructures; ballistic rectifiers; three-terminal ballistic junctions; quantum wires; planar quantum dots; logic gates; harmonic generation; InP; GaInAs; nanoelectronics; Fysik; Physics; nonlinear transport; electron transport; quantum nanodevices; ballistic nanodevices; Fysicumarkivet A:2003:Shorubalko;

   Sammanfattning : In this thesis, electron transport in quantum and ballistic devices was studied. The devices studied here were quantum wires, planar quantum dots, ballistic rectifiers, artificial functional materials, and three-terminal ballistic junctions. The possible application of such devices in the future nanoelectronics was also investigated. LÄS MER

3. 2. Optical Studies and Applications of Single Quantum Dots

   Författare :Valéry Zwiller; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; time resolved photoluminescence; Physics; Fysik; Semiconductory physics; Halvledarfysik; Condensed matter:electronic structure; electrical; magnetic and optical properties; supraconductors; magnetic resonance; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; spektroskopi; magnetisk resonans; microphotoluminescence; microcavities; photoluminescence; quantum optics; nano-optics; photonics; low dimensional structures; quantum dots; Fysicumarkivet A:2001:Zwiller;

   Sammanfattning : The luminescence from single quantum dots has been studied. Single dot photoluminescence was studied under continuous as well as under pulsed excitation. Time-resolved studies revealed fast relaxations in quantum dots. The time resolved measurements were fitted with a set of rate equations. LÄS MER

4. 3. Bright and strain-tunable semiconductor quantum dot devices

   Författare :Thomas Lettner; Val Zwiller; Klaus D. Jöns; Oliver Benson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum dots; single–photons; entanglement; strain–tunable; kvantprickar; singelfotoner; sammanflätning; töjnings-justerbar; Optik och fotonik; Optics and Photonics;

   Sammanfattning : Optically active semiconductor quantum dots have proven to be excellent single- and entangled-photon sources, with applications in quantum optics and quantum photonics. These sources are considered crucial in the development of future photonic quantum technology, such as quantum communication, quantum computation and quantum metrology. LÄS MER

5. 4. Growth, Physics, and Device Applications of InAs-based Nanowires

   Författare :Linus Fröberg; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; field effect transistors; Low-dimensional structures; nanowires; chemical beam epitaxy; heterostructures; III-V; InP; InAs; quantum dots; gate all-around; wrap gate;

   Sammanfattning : This thesis is based on three different projects: 1) the epitaxial growth of nanowires using chemical beam epitaxy, 2) the study of electron transport through quantum dots and multiple quantum dots in nanowires at low temperature, and 3) the development of wrap gated nanowire field effect transistors. In the first part, a method of studying the diffusion of the source material on the substrate surface was developed. LÄS MER

7. 5. Nanowire Heterostructures- Growth, Characterization and Optical Physics

   Författare :Niklas Sköld; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nano; Nanowire; photoluminescence; epitaxy; quantum dot;

   Sammanfattning : This thesis describes growth, processing, characterization and photoluminescence (PL) spectroscopy of nanowire heterostructures. The nanowires were made of III-V semiconductor materials and were produced by Au-particle assisted growth. LÄS MER