Signatures of Trions in the Optical Spectra of Doped Semiconductor Nanorings in a Magnetic Field

Meier, Torsten; Thomas, P.; Koch, S. W.; Maschke, K.

doi:10.1002/1521-3951(200211)234:1<283::aid-pssb283>3.0.co;2-j

Cited by 5 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, optical properties [62][63][64][65] including PL [46,49,54,[66][67][68][69] of QRs have been subject of interest together with effects found under the influence of static electric fields 15 [58,70,71]. One of the most recent field of study involving the ring structures has been their coupling to the angular momentum properties of light, especially to the OAM of light [72,73].…”

Section: Quantum Rings and The Change Of Carrier Rotational Charactersmentioning

confidence: 99%

Indirect interband optical transitions in a semiconductor quantum ring with submicrometer dimensions

et al. 2011

View full text Add to dashboard Cite

D e p a r t me nt o f M i c r o -a nd N a no s c i e nc e sT h e o re t ic al st udie s o f o pt ic al t ransit io ns in se mic o nduc t o r quant um st ruc t ure s O s mo V äns k ä D O C T O R A L D I S S E R T A T I O N SAalto University publication series DOCTORAL DISSERTATIONS 214/2014 Theoretical studies of optical transitions in semiconductor quantum structures Osmo VänskäA doctoral dissertation completed for the degree of Doctor of Science (Philosophy) to be defended, with the permission of the Aalto University School of Electrical Engineering, at a public examination held at the lecture hall TU1 of the TUAS building (Otaniementie 17, Espoo, Finland) on the 9th of January 2015 at 12 noon. Abstract Nanotechnologically fabricated structures out of compound semiconductor materials make up the functional parts in LEDs, in semiconductor lasers and in electronics components. The small size of the structures evidently leads to requiring the modeling to look at phenomena at the quantum level. Especially for optoelectronical devices, one needs to treat the interaction between light and semiconductor material. This research adds to the understanding of interpretations of light-matter interaction phenomena and makes it possible to find totally new and undiscovered functionalities in semiconductor nanostructures. AaltoThis thesis presents work on modeling and creates new theoretical foundations for phenomena appearing in semiconductor quantum structures. Of special interest has been to generate a theoretical description to such phenomena that have been caused by an optical field and in which one sees changes, e.g., in angular momentum or spatial distribution of excited states. Basically, two kinds of structures are examined, quantum rings and wells. A quantum ring is a toroidal object of which volume is very small, but its diameter can be significant when compared to the wavelength of light. Another class of systems under study is a double quantum well structure, where there are two quantum wells on both sides of a tunnel barrier. In this system, the type-I and type-II semiconductor band-structure properties become combined in spatial coordinates, since the electrons and holes can occupy either the same or the separate quantum wells.The two most interesting results are the angle-of-emission dependent photoluminescence from the quantum rings and the coherent control of vertical transport of desired quasiparticles through material interfaces in the quantum-well system in a selective manner. Since the obtained results on quantum rings are closely connected to the orbital-angular-momentum coupling between light and matter, they can prove to be important in different quantum information schemes where this angular-momentum aspect of light has been found to be highly beneficial. In quantum optics, there already are visible trends towards this direction. The predicted coherent control in a double-quantum-well system may mean a large technological progress, since by utilizing this effect one can study transport properties ...

show abstract

Section: Quantum Rings and The Change Of Carrier Rotational Charactersmentioning

confidence: 99%

Indirect interband optical transitions in a semiconductor quantum ring with submicrometer dimensions

et al. 2011

View full text Add to dashboard Cite

show abstract

Signatures of biexcitons and triexcitons in coherent non‐degenerate semiconductor optics

Meier

Sieh

Finger

et al. 2003

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

PACS 71.35. Ày, 73.21.Fg, 78.67.De Signatures of exciton and two-exciton states in semiconductor systems are investigated experimentally and theoretically. A set of quantum well samples with different well widths is studied using coherent excitation spectroscopy. The experimental results are analyzed using a microscopic model demonstrating the importance of biexciton correlations and disorder effects. Additional numerical investigations of absorption changes in small nanorings are employed to analyze optical transitions from two-exciton to three-exciton resonances.1 Introduction During the last decade significant progress has been made in understanding effects arising from many-body Coulomb correlations in coherent semiconductor optics, see e.g. [1][2][3]. Of particular importance in many studies has been the analysis of biexciton-induced contributions which strongly influence the dependence of low-intensity four-wave-mixing (FWM) and pump-probe (PP) signals on the polarization directions of the incident pulses.After briefly outlining the theoretical approach in Sect. 2, we discuss two examples to show that a detailed knowledge on biexciton-and also triexciton-induced resonances can be obtained using coherent non-degenerate nonlinear semiconductor optics. In Sect. 3 experimental results obtained via coherent excitation spectroscopy (CES) on a set of quantum wells with different well widths are presented. The observations are analyzed on the basis of microscopic model calculations. Numerical investigations of absorption changes in small nanorings using a two-color pump-probe (TCPP) set-up are presented in Sect. 4. This scheme is useful to analyze optical transitions between individual two-exciton and three-exciton resonances.

show abstract

Quantum Ring: A Unique Playground for the Quantum-Mechanical Paradigm

Fomin¹

2018

Physics of Quantum Rings

View full text Add to dashboard Cite

Signatures of Trions in the Optical Spectra of Doped Semiconductor Nanorings in a Magnetic Field

Cited by 5 publications

References 22 publications

Indirect interband optical transitions in a semiconductor quantum ring with submicrometer dimensions

Indirect interband optical transitions in a semiconductor quantum ring with submicrometer dimensions

Signatures of biexcitons and triexcitons in coherent non‐degenerate semiconductor optics

Quantum Ring: A Unique Playground for the Quantum-Mechanical Paradigm

Contact Info

Product

Resources

About