KŘÁPEK, Vlastimil, Petr KLENOVSKÝ and Tomáš ŠIKOLA. Type-I and Type-II Confinement in Quantum Dots: Excitonic Fine Structure. ACTA PHYSICA POLONICA A. Warsaw: POLISH ACAD SCIENCES INST PHYSICS, 2016, vol. 129, 1A, p. "A66"-"A69", 4 pp. ISSN 0587-4246. doi:10.12693/APhysPolA.129.A-66.
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Basic information
Original name Type-I and Type-II Confinement in Quantum Dots: Excitonic Fine Structure
Authors KŘÁPEK, Vlastimil (203 Czech Republic), Petr KLENOVSKÝ (203 Czech Republic, guarantor, belonging to the institution) and Tomáš ŠIKOLA (203 Czech Republic).
Edition ACTA PHYSICA POLONICA A, Warsaw, POLISH ACAD SCIENCES INST PHYSICS, 2016, 0587-4246.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher Poland
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 0.469
RIV identification code RIV/00216224:14740/16:00089553
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.12693/APhysPolA.129.A-66
UT WoS 000371623600014
Keywords in English quantum dots; type-II bandalignment; excitonic fine structure; theory
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Petr Klenovský, Ph.D., učo 105957. Changed: 18/3/2018 10:26.
Abstract
e have theoretically studied type-I and type-II confinement in InAs quantum dots with GaAsSb capping layer. The character of the confinement can be adjusted by the Sb content. We have found that upon the transition from type-I to type-II confinement the hole wave functions change the topology from a compact shape to a two-segment shape, resulting in the complex changes in the exciton fine structure splitting with zero values at particular compositions. Additionally, a high exciton radiative recombination probability is preserved even in type-II. This allows to design strongly luminescent quantum dots with naturally low fine structure splitting, which could serve as sources of entangled photon pairs for quantum communication.
Links
ED1.1.00/02.0068, research and development projectName: CEITEC - central european institute of technology
EE2.3.20.0027, research and development projectName: Posílení excelence vědeckých týmů v oblasti nano a mikrotechnologií
MUNI/A/1496/2014, internal MU codeName: Struktura, elektronová struktura a optická odezva pokročilých materiálů IV
Investor: Masaryk University, Grant Agency of Masaryk University, Category A
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