Serguei A. Komarov
Professor James S. Harris
Solid State Laboratory
Stanford University
Research Interests
Nanoscale Technology
Summary:
My research interests lie in the domain of small I would even say very small structures. Primarily my study concentrates on the most confined of them - quantum dots. There are two basic approaches to quantum dot fabrication: self- organization and lithography.
The major disadvantage of the first technique is certain lack of controlability, while lithography at its present state fails to create structures as small as those fabricated by the self-organization techniques. Thus, mainstream of the development is to converge these two approaches trying to improve uniformity and controlability of the self-organized systems as well as to shrink the dimensions of the lithographically defined structures.
In particular, I am interested in fabrication and characterization of self-assembled islands of InAs on GaAs and GaAs or In As on Si. I would like to study opportumities of island ordering in such systems. I collaborate on this project with Glenn Solomon former Harris Group member and now research associate in the group of Prof. Yoshihisa Yamamoto.
These quantum dots form columns when InAs islands are covered with GaAs capping layer. If GaAs spacer is not very thick dots in the column communicate with each other, i.e. electron wave functions in differents dots within one column overlap significantly. This fact suggests the idea of pillar memory element which will combine self-assembly of quantum dots with high resolution conventional lithography.
