scholarly journals Room-temperature single-photon emitters in titanium dioxide optical defects

2018 ◽  
Vol 9 ◽  
pp. 1085-1094 ◽  
Author(s):  
Kelvin Chung ◽  
Yu H Leung ◽  
Chap H To ◽  
Aleksandra B Djurišić ◽  
Snjezana Tomljenovic-Hanic
Keyword(s):  
Titanium Dioxide ◽  
Room Temperature ◽  
Single Photon ◽  
Photon Emission ◽  
Wide Bandgap ◽  
Single Photon Emission ◽  
Correlation Data ◽  
Single Photon Emitters ◽  
First Time ◽  
Photon Source

Fluorescence properties of crystallographic point defects within different morphologies of titanium dioxide were investigated. For the first time, room-temperature single-photon emission in titanium dioxide optical defects was discovered in thin films and commercial nanoparticles. Three-level defects were identified because the g (2) correlation data featured prominent shoulders around the antibunching dip. Stable and blinking photodynamics were observed for the single-photon emitters. These results reveal a new room-temperature single-photon source within a wide bandgap semiconductor.

scholarly journals Symmetry-tailored patterns and polarizations of single-photon emission

Nanophotonics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 3557-3565
Author(s):  
Guorui Zhang ◽  
Ying Gu ◽  
Qihuang Gong ◽  
Jianjun Chen
Keyword(s):  
Single Photon ◽  
Photon Emission ◽  
Silver Nanowire ◽  
Emission Rates ◽  
Single Photon Emission ◽  
Emission Pattern ◽  
Single Photon Emitters ◽  
Resonant Modes ◽  
Oriented Dipole ◽  
Centrally Symmetric

AbstractDue to small optical mode volumes and linear polarizations of surface-plasmon-polariton (SPP) resonant modes in metallic antennas, it is very difficult to obtain complex emission patterns and polarizations for single-photon emitters. Herein, nonresonant enhancement in a silver nanowire is used to both enhance emission rates and extract a z-oriented dipole, and then the symmetry of metallic nanostructures is proposed to tailor the patterns and polarizations of single-photon emission. The emission pattern of a quantum dot located close to a metallic nanostructure with a symmetric axis is split into multiple flaps. The number of splitting flaps is equal to the order of the symmetric axis. Moreover, the electric vectors of the emitted photons become centrally symmetric about the symmetric axis. The above phenomena are well explained by both a simulation and an image dipole model. The structural-symmetry-tailoring mechanism may open up a new avenue in the design of multifunctional and novel quantum-plasmonic devices.

scholarly journals Bright Room-Temperature Single-Photon Emission from Defects in Gallium Nitride

2017 ◽  
Vol 29 (12) ◽  
pp. 1605092 ◽  
Author(s):  
Amanuel M. Berhane ◽  
Kwang-Yong Jeong ◽  
Zoltán Bodrog ◽  
Saskia Fiedler ◽  
Tim Schröder ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Room Temperature ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission

Diamond based light-emitting diode for visible single-photon emission at room temperature

2011 ◽  
Vol 99 (25) ◽  
pp. 251106 ◽  
Author(s):  
A. Lohrmann ◽  
S. Pezzagna ◽  
I. Dobrinets ◽  
P. Spinicelli ◽  
V. Jacques ◽  
...  
Keyword(s):  
Room Temperature ◽  
Single Photon ◽  
Light Emitting Diode ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Light Emitting

scholarly journals Room-temperature single-photon emission from zinc oxide nanoparticle defects and their in vitro photostable intrinsic fluorescence

Nanophotonics ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 269-278 ◽  
Author(s):  
Kelvin Chung ◽  
Timothy J. Karle ◽  
Asma Khalid ◽  
Amanda N. Abraham ◽  
Ravi Shukla ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Room Temperature ◽  
Single Photon ◽  
Photon Emission ◽  
Intrinsic Defect ◽  
Single Photon Emission ◽  
Silica Substrate ◽  
Skin Cells ◽  
Oxide Nanoparticle

AbstractZinc oxide (ZnO) is a promising semiconductor that is suitable for bioimaging applications due to its intrinsic defect fluorescence. However, ZnO generally suffers from poor photostability. We report room-temperature single-photon emission from optical defects found in ZnO nanoparticles (NPs) formed by ion implantation followed by thermal oxidation in a silica substrate. We conduct a thorough investigation into the photophysics of a particularly bright defect and identify other single emitters within the NPs. Photostability was observed when the NPs were removed from the growth substrate and taken up by skin cells for in vitro imaging.

Electrically pumped single-photon emission at room temperature from a single InGaN/GaN quantum dot

2014 ◽  
Vol 105 (14) ◽  
pp. 141109 ◽  
Author(s):  
Saniya Deshpande ◽  
Thomas Frost ◽  
Arnab Hazari ◽  
Pallab Bhattacharya
Keyword(s):  
Quantum Dot ◽  
Room Temperature ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Electrically Pumped
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