scholarly journals Quantum-Dot-Based Photon Emission and Media Conversion for Quantum Information Applications

2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
H. Kumano ◽  
H. Nakajima ◽  
S. Ekuni ◽  
Y. Idutsu ◽  
H. Sasakura ◽  
...  
Keyword(s):  
Quantum Information ◽  
Quantum Dot ◽  
Electron Spin ◽  
Single Photon ◽  
Collection Efficiency ◽  
Photon Emission ◽  
Exciton State ◽  
Photon Pair ◽  
Photon Polarization ◽  
Pair Generation

Single-photon as well as polarization-correlated photon pair emission from a single semiconductor quantum dots is demonstrated. Single photon generation and single photon-pair generation with little uncorrelated multiphoton emission and the feasibility of media conversion of the quantum states between photon polarization and electron spin are fundamental functions for quantum information applications. Mutual media conversion for the angular momentum between photon polarization and electron spin is also achieved with high fidelity via positively charged exciton state without external magnetic field. This is a clear indication that the coupling of photon polarizations and electron spins keeps secured during whole processes before photon emission. Possibility of a metal-embedded structure is demonstrated with the observation of drastic enhancement of excitation and/or collection efficiency of luminescence as well as clear antibunching of photons generated from a quantum dot.

scholarly journals Tailoring the Geometry of Bottom-Up Nanowires: Application to High Efficiency Single Photon Sources

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1201
Author(s):  
Dan Dalacu ◽  
Philip J. Poole ◽  
Robin L. Williams
Keyword(s):  
Quantum Dot ◽  
High Efficiency ◽  
Emission Rate ◽  
Single Photon ◽  
Collection Efficiency ◽  
Photon Emission ◽  
Device Performance ◽  
Bottom Up ◽  
Selective Area ◽  
Photon Generation

For nanowire-based sources of non-classical light, the rate at which photons are generated and the ability to efficiently collect them are determined by the nanowire geometry. Using selective-area vapour-liquid-solid epitaxy, we show how it is possible to control the nanowire geometry and tailor it to optimise device performance. High efficiency single photon generation with negligible multi-photon emission is demonstrated using a quantum dot embedded in a nanowire having a geometry tailored to optimise both collection efficiency and emission rate.

scholarly journals Pure single-photon emission from an InGaN/GaN quantum dot

APL Materials ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 061106
Author(s):  
M. J. Holmes ◽  
T. Zhu ◽  
F. C.-P. Massabuau ◽  
J. Jarman ◽  
R. A. Oliver ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission

The coupling of single-photon exciton–biexciton quantum dot and cavity

2017 ◽  
Vol 26 (03) ◽  
pp. 1750029 ◽  
Author(s):  
Lina Jaya Diguna ◽  
Yudi Darma ◽  
Muhammad Danang Birowosuto
Keyword(s):  
Correlation Function ◽  
Quantum Dot ◽  
Density Matrix ◽  
High Probability ◽  
Single Photon ◽  
Photon Emission ◽  
Emission Properties ◽  
Proposed Model ◽  
Cavity System

We investigate the influence of multiple excitons on the photon emission properties of a quantum dot (QD)-cavity system via the master equation for the density matrix. We show that in the intermediate to strong coupling regimes, the multiple excitons lead to the suppressed QD emissions as well as the absence of anti-crossing near zero detuning, arising from the interaction between the multiple excitons and cavity. Furthermore, we analyze the role of the cavity-biexciton detuning in the photon emission properties of cavity and exciton through the second-order correlation function. The small cavity-biexciton detuning yields the significant Purcell effect and the high probability of single photon emissions. The proposed model offers the fundamental approach in developing efficient single-photon emitting devices.

CONTROLLED TELEPORTATION OF ELECTRON SPIN STATE IN QUANTUM DOT VIA SINGLE PHOTON

2008 ◽  
Vol 06 (03) ◽  
pp. 553-560
Author(s):  
YAN-WEI WANG ◽  
MING-FENG WANG ◽  
YI-ZHUANG ZHENG
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electron Spin ◽  
Spin State ◽  
Faraday Rotation ◽  
Quantum Teleportation ◽  
Single Photon ◽  
Controlled Teleportation ◽  
Controlled Quantum Teleportation ◽  
Qubit System

A controlled quantum teleportation scheme of electron spin state in a quantum dot is proposed. With the entanglement generating through the interaction between the quantum dots in microcavities and a single photon, the controlled teleportation can be implemented using Faraday rotation and single photon measurements. The scheme can be easily generalized to multi-qubit system.

scholarly journals Quantum State Transfer from a Single Photon to a Distant Quantum-Dot Electron Spin

2017 ◽  
Vol 119 (6) ◽  
Author(s):  
Yu He ◽  
Yu-Ming He ◽  
Yu-Jia Wei ◽  
Xiao Jiang ◽  
Kai Chen ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum State ◽  
Electron Spin ◽  
Single Photon ◽  
Quantum State Transfer ◽  
State Transfer

Single-Photon Emission at Liquid Nitrogen Temperature from a Single InAs/GaAs Quantum Dot

2008 ◽  
Vol 25 (9) ◽  
pp. 3231-3233 ◽  
Author(s):  
Dou Xiu-Ming ◽  
Sun Bao-Quan ◽  
Chang Xiu-Ying ◽  
Xiong Yong-Hua ◽  
Huang She-Song ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Liquid Nitrogen ◽  
Single Photon ◽  
Photon Emission ◽  
Liquid Nitrogen Temperature ◽  
Single Photon Emission ◽  
Gaas Quantum Dot

ORGANIC SEMICONDUCTOR MICRO-PILLAR PROCESSED BY FOCUSED ION BEAM MILLING

2005 ◽  
Vol 03 (supp01) ◽  
pp. 223-228 ◽  
Author(s):  
WEN-CHANG HUNG ◽  
A. ADAWI ◽  
A. TAHRAOUI ◽  
A. G. CULLIS
Keyword(s):  
Quantum Dot ◽  
Single Molecule ◽  
Focused Ion Beam ◽  
Single Photon ◽  
Ion Beam ◽  
Photon Emission ◽  
Micro Machining ◽  
Single Photon Emission ◽  
Fabrication Procedure ◽  
Pillar Structure

In order to control light, different strategies have been applied by placing an optically active medium into a semiconductor resonator and certain applications such as LEDs and laser diodes have been commercialized for many years. The possibility of nanoscale optical applications has created great interesting for quantum nanostructure research. Recently, single photon emission has been an active area of quantum dot research. A quantum dot is place between distributed Bragg reflectors (DBRs) within a micro-pillar structure. In this study, we shall report on an active layer composed of an organic material instead of a semiconductor. The micro-pillar structure is fabricated by a focused ion beam (FIB) micro-machining technique. The ultimate target is to achieve a single molecule within the micro-pillar and therefore to enable single photon emission. Here, we demonstrate some results of the fabrication procedure of a 5 micron organic micro-pillar via the focused ion beam and some measurement results from this study. The JEOL 6500 dual column system equipped with both electron and ion beams enables us to observe the fabrication procedure during the milling process. Furthermore, the strategy of the FIB micro-machining method is reported as well.

scholarly journals Triggered single-photon emission and cross-correlation properties in InAlAs quantum dot

2006 ◽  
Vol 32 (1-2) ◽  
pp. 144-147 ◽  
Author(s):  
Hidekazu Kumano ◽  
Satoshi Kimura ◽  
Michiaki Endo ◽  
Ikuo Suemune ◽  
Hirotaka Sasakura ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Cross Correlation ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Correlation Properties
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