Results 1 to 10 of about 240,081 (351)
Gate-induced blueshift and quenching of photoluminescence in suspended single-walled carbon nanotubes [PDF]
Phys. Rev. B 84, 121409(R) (2011), 2011 Gate-voltage effects on photoluminescence spectra of suspended single-walled carbon nanotubes are investigated. Photoluminescence microscopy and excitation spectroscopy are used to identify individual nanotubes and to determine their chiralities. Under an application of gate voltage, we observe slight blueshifts in the emission energy and strong ...
Chiashi, S. +6 more
arxiv +6 more sources
Comparison of the photoluminescence properties of semiconductor quantum dots and non-blinking diamond nanoparticles. Observation of the diffusion of diamond nanoparticles in living cells [PDF]
, 2009 Long-term observations of photoluminescence at the single-molecule level were until recently very diffcult, due to the photobleaching of organic ?uorophore molecules. Although inorganic semiconductor nanocrystals can overcome this diffculty showing very low photobleaching yield, they suffer from photoblinking. A new marker has been recently introduced,
Boudou, Jean-Paul +6 more
arxiv +7 more sources
Photoluminescence of nanocrystals embedded in oxide matrices [PDF]
, 2006 We used the theory of finite periodic systems to explain the photoluminescence spectra dependence on the average diameter of nanocrystals embedded in oxide matrices. Because of the broad matrix band gap, the photoluminescence response is basically determined by isolated nanocrystals and sequences of a few of them.
Bagnall +9 more
arxiv +3 more sources
Polariton parametric photoluminescence in spatially inhomogeneous systems [PDF]
, 2008 A general theory of polariton parametric photoluminescence in spatially inhomogeneous systems is developed. The quantum Langevin equations are solved in a generalized Bogoliubov de Gennes approximation. We apply the formalism to the specific case of a disordered microcavity. In this case, we numerically solve the equations for the coherent emission and
Sarchi, Davide +2 more
arxiv +5 more sources
Influence of Gold Nanoantennas on the Photoluminescence of Silicon Nanocrystals
Photonics, 2022 We study the influence of gold nanoantennas on the photoluminescence signal of silicon nanocrystals. Unlike bulk silicon, which only exhibits low photoluminescence at room temperature due to its indirect band gap, silicon nanocrystals have the advantage ...
Ronja Köthemann +3 more
doaj +1 more source
Excimer Laser Surface Patterning for Photoluminescence Enhancement of Silicon Nanocrystals
Photonics, 2023 A method for enhancing the photoluminescence of silicon nanocrystals in a silicon oxide matrix by fabrication of periodic surface structures through laser irradiation is demonstrated.
Lukas Janos Richter +3 more
doaj +1 more source
Control of yellow photoluminescence in AlGaN/GaN heterostructures [PDF]
Modern Electronic Materials, 2019 Photoluminescence with the peak corresponding to yellow color of the visible spectrum (so-called yellow luminescence) originates from deep levels in the GaN buffer layers of heterostructures and depends on heterostructure growth conditions.
Nadezhda B. Gladysheva +4 more
doaj +3 more sources
Photoluminescence Properties of Nanocrystals [PDF]
Journal of Nanomaterials, 2012 Photoluminescence (PL) is an optical phenomenon exhibited by some semiconductor materials when excited by an electromagnetic radiation source. After the excitation and recombination processes, these kinds of materials are able to emit photons with less energy than those employed during the electronic excitation.
Cavalcante, Laécio Santos +5 more
openaire +2 more sources
Multi-parameter temperature prediction based on optical fiber filled with CsPbX3 QDs
AIP Advances, 2021 To expand the range of application of quantum dots in the field of temperature sensing, this paper proposed three kinds of temperature sensors based on CsPbX3 (X = Br, Br/I, and I) quantum dots filling into hollow-core fibers.
Shiyezi Xiang +6 more
doaj +1 more source
Optical properties of LiNbO3:B crystals
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022 The optical properties of nominally pure LiNbO3stoich, near-stoichiometric LiNbO3stoich (6,0 wt% K2O), LiNbO3cong and LiNbO3:B (0,55 and 0,83 mol% B2O3 in the charge) crystals in the visible region of the spectrum (λ = 380-700 nm) were studied by ...
N.V. Sidorov +4 more
doaj +1 more source