Optical and electronic properties of low-density InAs/InP quantum-dot-like structures designed for single-photon emitters at telecom wavelengths

We report on single photon emitters for the green-yellow spectral range, which comprise a CdSe/ZnSe quantum dot placed inside a semiconductor tapered nanocolumn acting as a multimode nanoantenna. Despite the presence of many optical modes inside, such a nanoantenna is able to collect the quantum dot radiation and ensure its effective output. We demonstrate periodic arrays of such emitters, which are fabricated by focused ion beam etching from a II-VI/III-V heterostructure grown using molecular beam epitaxy. With non-resonant optical pumping, the average count rate of emitted single photons exceeds 5 MHz with the second-order correlation function g(2)(0) = 0.25 at 220 K. Such single photon emitters are promising for secure free space optical communication lines.

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Optical and electronic properties of layer-by-layer and composite polyaniline-cadmium selenide quantum dot films

Superlattices and Microstructures ◽

10.1016/j.spmi.2015.04.031 ◽

2015 ◽

Vol 84 ◽

pp. 154-164 ◽

Cited By ~ 6

Author(s):

Ambreen Ayub ◽

Abdul Shakoor ◽

Asmat Elahi ◽

Tasneem Zahra Rizvi

Keyword(s):

Quantum Dot ◽

Electronic Properties ◽

Cadmium Selenide ◽

Layer By Layer ◽

Optical And Electronic Properties

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Thermal effects in InP/(Ga,In)P quantum-dot single-photon emitters

Physical Review B ◽

10.1103/physrevb.80.161305 ◽

2009 ◽

Vol 80 (16) ◽

Cited By ~ 8

Author(s):

A. K. Nowak ◽

E. Gallardo ◽

D. Sarkar ◽

H. P. van der Meulen ◽

J. M. Calleja ◽

...

Keyword(s):

Quantum Dot ◽

Thermal Effects ◽

Single Photon ◽

Single Photon Emitters

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Time-Integrated Photoluminescence Studies of In0.3Ga0.7As/GaAs Quantum Dot Molecules

MRS Proceedings ◽

10.1557/proc-0935-k04-06 ◽

2006 ◽

Vol 935 ◽

Author(s):

William Kerr ◽

Valeria Gabriela Stoleru ◽

Anup Pancholi

Keyword(s):

Quantum Dot ◽

Electronic Properties ◽

Temperature Dependent ◽

Quantum Dot Molecules ◽

Gaas Barrier ◽

Optical And Electronic Properties ◽

Gaas Quantum Dot ◽

Photoluminescence Studies ◽

Stacked Quantum Dots ◽

Good Agreement

ABSTRACTWe investigate experimentally and theoretically optical and electronic properties of In0.3Ga0.7As/GaAs quantum dot molecules (QDMs) formed by two layers of self-assembled, vertically stacked quantum dots (QDs). Structures with In0.3Ga0.7As/GaAs QD layers separated by a thin GaAs barrier were grown by solid source molecular beam epitaxy, and were characterized by time-integrated photoluminescence (PL). For the temperature-dependent PL measurements a He-flow optical cryostat was used to control the temperature between 4 and 300 K. The experimentally observed behavior is in good agreement with that expected from our eight-band k·p calculations. Optical and electronic properties of these QDMs are further compared with those of dots grown under conditions that did not promote vertical organization.

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Eco-Friendly Techniques to Synthesize Quantum Dots

Materials Research Foundations - Quantum Dots - Properties and Applications ◽

10.21741/9781644901250-1 ◽

2021 ◽

pp. 1-52

Keyword(s):

Quantum Dots ◽

Particle Size ◽

Solid State ◽

Quantum Dot ◽

Electronic Properties ◽

Quantum Effects ◽

Nano Technology ◽

Major Topic ◽

Optical And Electronic Properties ◽

Wet Chemical

Quantum dot defines as a nanoparticle with particle size smaller than its exciton Bohr radius. Due to the remarkable quantum effects such as optical and electronic properties, they have attracted a great deal of attention by researchers and industries. Therefore, quantum dots have become a major topic in nano-technology. Here, we describe the most recent eco-friendly techniques that have been used to synthesize quantum dots, including biogenic methods, such as plant-mediated, microorganisms-mediated methods, wet chemical and solid-state methods.

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