Abstract
While the properties of individual quantum dots (QDs) are deemed attractive for applications in quantum computing, practically, they are insufficient. However, being able to group QDs to enable communication among them (quantum dot molecules—QDMs) is still extremely challenging although this field has been studied for about 20 years. Therefore, in an attempt to control the lateral ordering of QDs, researchers at the University of Arkansas have developed a simple hybrid technique to fabricate QD pairs (QDPs) and QDMs. This technique has shown promise and paves the way for investigating possible interactions between QDs, taking us one step further to realizing quantum computing.
Highlights
While the properties of individual quantum dots (QDs) are deemed attractive for applications in quantum computing, practically, they are insufficient
In an attempt to control the lateral ordering of QDs, researchers at the University of Arkansas have developed a simple hybrid technique to fabricate QD pairs (QDPs) and QDMs
Sablon, Zhiming Wang and Gregory Salamo and other co-authors have taken lateral ordering of QDs to a whole new level and have devoted much effort to controlling the configuration of QDMs. Their most recent findings were reported in an article entitled, ‘‘Configuration control of quantum dot molecules by droplet epitaxy’’, published in Applied Physics Letters in 2008. ‘‘Self-assembly of semiconductor nanostructures has been intensively investigated’’, Sablon explains to Nanospotlight. ‘‘the stranski-krastanow (SK)-based growth approach, which is used in latticemismatch systems, has made it possible to achieve a vast range of structures with control over size and density but results in a random lateral spacing of QDs which can hinder the QD functionality as a qubit in quantum computing.’’ an alternative growth approach, termed droplet epitaxy (DE), was developed and integrated with the SK method
Summary
While the properties of individual quantum dots (QDs) are deemed attractive for applications in quantum computing, practically, they are insufficient. A Hybrid Approach That Will Unleash a Plethora of New QD Nanostructures, Bringing Us a Step Further to Laterally Coupled QDs
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