Quantum dot
hideA quantum dot is a semiconductor whose excitons are confined in all three spatial dimensions. As a result, they have properties that are between those of bulk semiconductors and those of discrete molecules. They were discovered by Louis E. Brus, who was then at Bell Labs. The term "Quantum Dot" was coined by Mark Reed.
Researchers have studied quantum dots in transistors, solar cells, LEDs, and diode lasers. They have also investigated quantum dots as agents for medical imaging and hope to use them as qubits.
For more information about Quantum dot, read the full article at
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News tagged with quantum dots
Operating quantum memory at room temperature
Aug 25, 2008 |
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Quantum dots, along with quantum wires, have been attracting notice over the past decade as possible building blocks of quantum information processing. Indium arsenide quantum dots (InAs) can be used for memory operations ...
A broadband single-photon source
Sep 19, 2008 |
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As science makes progress toward practical quantum computing, improved quantum cryptography and scalable quantum communications systems, single photon sources will become more important. Until now, though, ...
Nanoparticles + light = dead tumor cells
Nanotechnology / Bio & Medicine
Jul 29, 2008 |
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Medical physicists at the University of Virginia have created a novel way to kill tumor cells using nanoparticles and light. The technique, devised by Wensha Yang, an instructor in radiation oncology at the University of ...
New paper offers insights into 'blinking' phenomena
Jul 01, 2008 |
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A new paper by a team of researchers led by University of Notre Dame physicist Bolizsár Jankó provides an overview of research into one of the few remaining unsolved problems of quantum mechanics.
Physicists Demonstrate Three-Color Entanglement
Oct 07, 2009 |
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(PhysOrg.com) -- For the first time, physicists have demonstrated the quantum entanglement of three light beams, all of different wavelengths. Entanglement of two light beams of different wavelengths has already ...
Light touch: Controlling the behavior of quantum dots
Aug 19, 2008 |
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Researchers from the National Institute of Standards and Technology and the Joint Quantum Institute (JQI), a collaborative center of the University of Maryland and NIST, have reported a new way to fine-tune ...
Single Atom Quantum Dots Bring Real Devices Closer (Video)
Jan 27, 2009 |
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(PhysOrg.com) -- Single atom quantum dots created by researchers at Canada’s National Institute for Nanotechnology and the University of Alberta make possible a new level of control over individual electrons, ...
Relationships Between Quantum Dots - Stability and Reproduction
Oct 20, 2008 |
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(PhysOrg.com) -- Theoretical proof of stable and measurable states extending over two quantum dots and creating offspring has now been provided for the first time. This supports the notion of what is known ...
Physicists Detect Single-Electron Tunneling with Quantum Dots
May 06, 2009 |
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(PhysOrg.com) -- Detecting the coherent motion of a single electron is a challenge, for the simple reason of scale: the timescale of the coherent motion of a single-electron wave function is in the picosecond ...
Physicists create first atomic-scale map of quantum dots
Sep 29, 2009 |
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(PhysOrg.com) -- University of Michigan physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing "designer dots" that can be tailored for specific applications.
Tiny particles make LED light more pleasing
Nanotechnology / Nanomaterials
May 05, 2009 |
4.9 / 5 (11) |
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(AP) -- Light-emitting diodes are prime candidates for replacing inefficient incandescent bulbs, but have a few things working against them. They can provide a pleasing warm light or they can be energy-efficient, ...
Atoms don't dance the 'Bose Nova'
Sep 03, 2009 |
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(PhysOrg.com) -- Hanns-Christoph Naegerl's research group at the Institute for Experimental Physics, Austria, has investigated how ultracold quantum gases behave in lower spatial dimensions. They successfully ...
A new material could act as a nanofridge for microchips
Nanotechnology / Nanomaterials
Oct 08, 2008 |
4.8 / 5 (10) |
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In the past few years, the design and manufacturing of circuits at nanoscopic scale for integrated devices has become one of the frontier fields in new material science and technology. The significant reduction achieved in ...
'Squeezing' light into quantum dots
Apr 01, 2009 |
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(PhysOrg.com) -- “Quantum wells have been instrumental in telecommunications, enabling light amplification,” Patanjali Kambhampati tells PhysOrg.com, “but theory has suggested that a very small - colloidal - quantum dot co ...
Quantum doughnuts slow and freeze light at will: 'fast computing & slow glass'
Mar 09, 2009 |
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(PhysOrg.com) -- Research led by the University of Warwick has found a way to use doughnuts shaped by-products of quantum dots to slow and even freeze light, opening up a wide range of possibilities from reliable and effective ...
