Nanotechnology Spotlight – Latest Articles

RSS Subscribe to our Nanotechnology Spotlight feed

Showing Spotlights 41 - 44 of 44 in category All (newest first):


Quantum dot molecules - one step further towards quantum computing

Individual quantum dots (QDs) have been widely investigated for the past 15 years, showing their potential applications in quantum computing. However, individual QDs are not enough for practical applications, but preparing and characterizing groups of QDs with controllable crosstalk (quantum dot molecule) is very challenging still. University of Arkansas researchers discovered a simply way to fabricate QD pairs, the most simple QD molecule. This provides a unique opportunity to study carrier interaction among QDs, one step further towards quantum computing.

Aug 16th, 2006

Quantum dot nanodevices with carbon nanotubes

Carbon nanotubes are attractive materials as the building block of quantum-dot based nanodevices. In particular, single-wall carbon nanotubes (SWCNTs) are interesting because they become metallic and semiconducting, depending on how they are rolled up from the graphene sheet, and they could be applied to various devices such as ultrasmall field-effect transistors, single-electron devices, quantum computing devices, and light-emitting devices. A research group at the Japanese Institute of Physical and Chemical Research (RIKEN) has made extensive experimental efforts to apply SWCNTs to single-electron devices and quantum computing devices (spin qubit) with a single quantum dot as a basic structure.

Aug 4th, 2006

Quantum dot necklaces and other QD chains

For the past two years, the molecular-beam-epitaxy (MBE) group at the University of Arkansas has developed a novel growth procedure to laterally line up self-assembled InGaAs quantum dots (QDs).

Apr 12th, 2006

Quantum dots in a tube could open a new chapter in opto-electronics

Researchers in Germany managed to integrate quantum dots (QD) into the walls of nano- and microtubes. This novel structure serves as a quantum light emitter as well as optical waveguide. This represents a major step toward the realization of flexible high quality factor optical resonators based on tubes.

Apr 11th, 2006