Photoluminescence experiment on quantum dots embedded in a large Purcell-factor microcavity

B. Gayral; J. M. Gérard

doi:10.1103/physrevb.78.235306

Plasmon–exciton systems with high quantum yield using deterministic aluminium nanostructures with rotational symmetries

Nanoscale ◽

10.1039/c9nr06311k ◽

2019 ◽

Vol 11 (42) ◽

pp. 20315-20323 ◽

Cited By ~ 1

Author(s):

Landobasa Y. M. Tobing ◽

Muhammad Danang Birowosuto ◽

Kah Ee Fong ◽

Yuan Gao ◽

Jinchao Tong ◽

...

Keyword(s):

Quantum Dots ◽

Quantum Yield ◽

High Quantum Yield ◽

Purcell Factor ◽

High Quantum ◽

Single Antenna

We study the emission of quantum dots coupled with aluminium nanoantenna of C6 symmetry, and observe Purcell factor in the range of 68.01 < Fp < 118.25 corresponding to a modified quantum yield of >89% in the single antenna.

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Nano-Patch Antennas as an Evolution of Optical Antennas

Vestnik RFFI ◽

10.22204/2410-4639-2019-103-03-78-92 ◽

2019 ◽

pp. 78-92

Author(s):

Alexander V. Gritsienko ◽

Nikita S. Kurochkin ◽

Stanislav P. Eliseev ◽

Alexei G. Vitukhnovsky

Keyword(s):

Quantum Dots ◽

Near Infrared ◽

Molecular Complexes ◽

Decay Rates ◽

Photon Radiation ◽

Color Centers ◽

Single Photons ◽

Patch Antennas ◽

Wave Band ◽

Purcell Factor

In this paper, we review antennas from the radio wave band to the optical band. The main characteristics of the antennas determining their operation are given. The class of nano-patch antennas (NPA) of the visible and near-infrared ranges is distinguished. The advantage of nano-patch antennas is the good directivity of the antenna radiation and the significant Purcell factor (>102 –103 ), while the technology for creating these antennas is quite simple. The paper also presents various types of photon radiation sources in NPA, among which molecular complexes, quantum dots and color centers in diamonds can be distinguished. On the basis of nano-patch antennas with quantum dots and color centers in nanodiamonds, it is possible to create sources of single photons with picosecond decay rates. The comparison of the characteristics of NPA depending on the shape of plasmon nanoparticles is presented.

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Nanostructure of semiconductor quantum dots in a borosilicate glass matrix by complementary use of HREM and AEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100176770 ◽

1990 ◽

Vol 48 (4) ◽

pp. 728-729

Author(s):

M.J. Kim ◽

L.C. Liu ◽

S.H. Risbud ◽

R.W. Carpenter

Keyword(s):

Quantum Dots ◽

Borosilicate Glass ◽

Glass Matrix ◽

Optical Switching ◽

Response Times ◽

Fast Response ◽

Processing Technique ◽

Internal Stresses ◽

Electron Hole ◽

Spatial Dimensions

When the size of a semiconductor is reduced by an appropriate materials processing technique to a dimension less than about twice the radius of an exciton in the bulk crystal, the band like structure of the semiconductor gives way to discrete molecular orbital electronic states. Clusters of semiconductors in a size regime lower than 2R {where R is the exciton Bohr radius; e.g. 3 nm for CdS and 7.3 nm for CdTe) are called Quantum Dots (QD) because they confine optically excited electron- hole pairs (excitons) in all three spatial dimensions. Structures based on QD are of great interest because of fast response times and non-linearity in optical switching applications.In this paper we report the first HREM analysis of the size and structure of CdTe and CdS QD formed by precipitation from a modified borosilicate glass matrix. The glass melts were quenched by pouring on brass plates, and then annealed to relieve internal stresses. QD precipitate particles were formed during subsequent "striking" heat treatments above the glass crystallization temperature, which was determined by differential thermal analysis.

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