scholarly journals Molecular Insights of Carbon Nanodots Formation and Their Two‐Photon Emission Properties

2021 ◽  
pp. 2100092
Author(s):  
Nilanjon Naskar ◽  
Manfred Wagner ◽  
Hans Joachim Räder ◽  
Haoyuan Qi ◽  
Ute Kaiser ◽  
...  
Keyword(s):  
Photon Emission ◽  
Carbon Nanodots ◽  
Emission Properties ◽  
Two Photon

scholarly journals Molecular Insights of Carbon Nanodot Formation and Their Two-Photon Emission Properties

2021 ◽  
Author(s):  
Nilanjon Naskar ◽  
Manfred Wagner ◽  
Hans Joachim Räder ◽  
Haoyuan Qi ◽  
Ute Kaiser ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Rational Design ◽  
Molecular Level ◽  
Photon Emission ◽  
Carbon Nanodots ◽  
Emission Characteristics ◽  
Organic Chromophores ◽  
Two Photon ◽  
Great Relevance ◽  
Organic Precursors

The structure formation of carbon nanodots (C-dots) prepared from three different organic precursors is discussed at the molecular level. During microwave synthesis, organic chromophores associated with C-dot structures are formed that exhibit distinct optical features. We have elucidated the molecular structure of these fluorophores and investigated their optical properties with and without the C-dots. The emergence of two-photon emission was observed and correlated with the hybridization state of the carbon atoms within the C-dot as well as the formation of the fluorophores. Varying contents of sp2 and sp3 hybridization in different C-dots also affects their one-photon and two-photon emission characteristics. Understanding the molecular structure of the <br>carbon nanocore and the organic fluorophores formed in C-dots would enable rational design of C-dots with improved optical features, which would be of great relevance for their applications, for example, in bioimaging. <br>

scholarly journals Molecular Insights of Carbon Nanodot Formation and Their Two-Photon Emission Properties

2021 ◽  
Author(s):  
Nilanjon Naskar ◽  
Manfred Wagner ◽  
Hans Joachim Räder ◽  
Haoyuan Qi ◽  
Ute Kaiser ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Rational Design ◽  
Molecular Level ◽  
Photon Emission ◽  
Carbon Nanodots ◽  
Emission Characteristics ◽  
Organic Chromophores ◽  
Two Photon ◽  
Great Relevance ◽  
Organic Precursors

The structure formation of carbon nanodots (C-dots) prepared from three different organic precursors is discussed at the molecular level. During microwave synthesis, organic chromophores associated with C-dot structures are formed that exhibit distinct optical features. We have elucidated the molecular structure of these fluorophores and investigated their optical properties with and without the C-dots. The emergence of two-photon emission was observed and correlated with the hybridization state of the carbon atoms within the C-dot as well as the formation of the fluorophores. Varying contents of sp2 and sp3 hybridization in different C-dots also affects their one-photon and two-photon emission characteristics. Understanding the molecular structure of the <br>carbon nanocore and the organic fluorophores formed in C-dots would enable rational design of C-dots with improved optical features, which would be of great relevance for their applications, for example, in bioimaging. <br>

FEASIBILITY OF THE TWO PHOTON EMISSION ATOMIC PHOSPHOR

1996 ◽  
Vol 80 (Appendix) ◽  
pp. 339-340
Author(s):  
Makoto Toho ◽  
Hideyoshi Kimura
Keyword(s):  
Photon Emission ◽  
Two Photon

Pulse amplification by stimulated two-photon emission

1970 ◽  
Vol 31 (5) ◽  
pp. 256-257 ◽  
Author(s):  
L.L. Hope ◽  
M.O. Vassell
Keyword(s):  
Photon Emission ◽  
Pulse Amplification ◽  
Two Photon

Two-photon emission spectrum of a two-level atom in an ideal cavity

1994 ◽  
Vol 49 (5) ◽  
pp. 4009-4015 ◽  
Author(s):  
Lin-sheng He ◽  
Xun-li Feng
Keyword(s):  
Emission Spectrum ◽  
Photon Emission ◽  
Two Photon ◽  
Level Atom

scholarly journals Tailoring and enhancing spontaneous two-photon emission using resonant plasmonic nanostructures

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
Alexander N. Poddubny ◽  
Pavel Ginzburg ◽  
Pavel A. Belov ◽  
Anatoly V. Zayats ◽  
Yuri S. Kivshar
Keyword(s):  
Photon Emission ◽  
Plasmonic Nanostructures ◽  
Two Photon

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.

scholarly journals Quantum states of an electromagnetic field interacting with a classical current and their applications to radiation problems

2020 ◽  
Vol 27 (4) ◽  
pp. 902-911
Author(s):  
V. G. Bagrov ◽  
D. M. Gitman ◽  
A. A. Shishmarev ◽  
A. J. D. Farias
Keyword(s):  
Electromagnetic Field ◽  
Synchrotron Radiation ◽  
Dirac Equation ◽  
Photon Emission ◽  
Quantum States ◽  
Photon Radiation ◽  
Electric Currents ◽  
Scalar Particles ◽  
Two Photon ◽  
The Relationship

Synchrotron radiation was originally studied by classical methods using the Liénard–Wiechert potentials of electric currents. Subsequently, quantum corrections to the classical formulas were studied, considering the emission of photons arising from electronic transitions between spectral levels, described in terms of the Dirac equation. In this paper, an intermediate approach is considered, in which electric currents generating the radiation are considered classically while the quantum nature of the radiation is taken into account exactly. Such an approximate approach may be helpful in some cases; it allows one to study one-photon and multi-photon radiation without complicating calculations using corresponding solutions of the Dirac equation. Here, exact quantum states of an electromagnetic field interacting with classical currents are constructed and their properties studied. With their help, the probability of photon emission by classical currents is calculated and relatively simple formulas for one-photon and multi-photon radiation are obtained. Using the specific circular electric current, the corresponding synchrotron radiation is calculated. The relationship between the obtained results and those known before are discussed, for example with the Schott formula, with Schwinger calculations, with one-photon radiation of scalar particles due to transitions between Landau levels, and with some previous results of calculating two-photon synchrotron radiation.

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