Enhancement of photon emission rate in antenna-coupled nanoLEDs

2012 ◽  
Author(s):  
Michael Eggleston ◽  
Nikhil Kumar ◽  
Liming Zhang ◽  
Eli Yablonovitch ◽  
Ming C. Wu
Keyword(s):  
Emission Rate ◽  
Photon Emission

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 Thermal Excitation Control over Photon Emission Rate of CdSe Nanocrystals

Nano Letters ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 2322-2328
Author(s):  
Benjamin T. Diroll ◽  
Richard D. Schaller
Keyword(s):  
Emission Rate ◽  
Photon Emission ◽  
Cdse Nanocrystals ◽  
Thermal Excitation ◽  
Excitation Control

Resonant photon emission during relative sliding of two dielectric plates

2020 ◽  
Vol 35 (03) ◽  
pp. 2040011 ◽  
Author(s):  
Aleksandr Volokitin
Keyword(s):  
Heat Generation ◽  
Doppler Effect ◽  
Radiative Heat ◽  
Emission Rate ◽  
Photon Emission ◽  
Frequency Range ◽  
Surface Phonon ◽  
Photon Tunneling ◽  
Plasmon Polaritons ◽  
Different Origin

The effect of resonances in the photon emission rate in radiative heat generation and transfer, and Casimir friction at the relative sliding of two plates of polar dielectrics is studied. Resonances are of a different origin in the frequency range of the normal (NED) and anomalous (AED) Doppler effect. In the NED domain, resonances are associated with resonant photon tunneling between surface phonon/plasmon polaritons. In the AED domain resonances are associated with the instantaneous generation of excitations in both plates. While in the NED domain the resonances are finite, in the ADE domain singular resonances are possible even in the presence of dissipation in the system.

Impact of Approximations in Operating History Data on Spent Fuel Properties with Serpent 2

2021 ◽  
Author(s):  
Silja Häkkinen
Keyword(s):  
Spontaneous Fission ◽  
Spent Nuclear Fuel ◽  
Emission Rate ◽  
Photon Emission ◽  
Fuel Properties ◽  
Fission Rate ◽  
Decay Heat ◽  
Activity Decay ◽  
Operating History ◽  
Assembly Activity

Abstract In this work, the effect of averaging operating history parameters such as power history, boron concentration and coolant density and temperature on spent nuclear fuel properties was investigated. The examined properties were assembly activity, decay heat, photon emission rate, spontaneous fission rate and the concentration of some mobile nuclides and fissile nuclides. Calculations were performed on two similar VVER-440 fuel assemblies irradiated in different positions of the core using Serpent 2. Averaging power history over the entire irradiation history had a significant effect on assembly activity, decay heat and photon emission rate overestimating these properties approximately 70 % right after irradiation. However, the effect quickly died out and after 10 years of cooling the effect was less than 1 %. If the last cycle (3rd cycle) was modelled accurately and the power density of only the first two cycles were averaged, the differences remained always below 1 %. The effect of operating history approximations on spontaneous fission rate and the nuclide concentrations was much smaller reamaining mostly below 1.5 %. The sensitivity of nuclide concentrations to approximations in individual operating history parameters was dependent on the nuclide in question and no trend applying to all studied nuclides could be observed.

Phenomenological modeling of the photon production rate from the QGP at finite quark chemical potential

2015 ◽  
Vol 30 (33) ◽  
pp. 1550196 ◽  
Author(s):  
Yogesh Kumar ◽  
Poonam Jain
Keyword(s):  
Significant Contribution ◽  
Chemical Potential ◽  
Emission Rate ◽  
Photon Emission ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Photon Production ◽  
Phenomenological Parameter ◽  
Ion Collisions

We show the extended calculation of leading order process for photon production from Quark–Gluon Plasma (QGP) using a finite quark mass incorporating phenomenological parameter of quarks and gluons with the effect of quark chemical potential. The photon emission rate is observed in the range of low and intermediate transverse momentum. Our modified results of photon production give significant contribution in the range of quark phenomenological parameter, i.e. [Formula: see text] of high-energy heavy-ion collisions. The results obtained are compared with other results.

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