Time-resolved non-linear nanoscopy

2017 ◽  
Author(s):  
Matthias Lenzner ◽  
Wolfgang Rudolph ◽  
Luke Emmert
Keyword(s):  
Time Resolved ◽  
Non Linear

scholarly journals Time-resolved non-linear optical response and photo-induced carriers trapping in glassy semiconductors

2020 ◽  
Vol 1461 ◽  
pp. 012139
Author(s):  
E Romanova ◽  
A Afanasiev ◽  
A Velmuzhov ◽  
M Sukhanov ◽  
Yu Kuzyutkina ◽  
...  
Keyword(s):  
Optical Response ◽  
Time Resolved ◽  
Non Linear ◽  
Linear Optical

A time-resolved luminescence spectroscopy study of non-linear optical crystals K2Al2B2O7

2012 ◽  
Vol 132 (7) ◽  
pp. 1632-1638 ◽  
Author(s):  
I.N. Ogorodnikov ◽  
V.A. Pustovarov ◽  
S.A. Yakovlev ◽  
L.I. Isaenko ◽  
S.A. Zhurkov
Keyword(s):  
Luminescence Spectroscopy ◽  
Spectroscopy Study ◽  
Time Resolved ◽  
Optical Crystals ◽  
Non Linear ◽  
Linear Optical

scholarly journals A Time-independent Deformer for Elastic-rigid Contacts

2020 ◽  
Vol 3 (1) ◽  
pp. 1-21
Author(s):  
Camille Brunel ◽  
Pierre Bénard ◽  
Gaël Guennebaud ◽  
Pascal Barla
Keyword(s):  
Contact Region ◽  
Time Resolved ◽  
Rigid Object ◽  
Volume Preservation ◽  
Non Linear ◽  
Two Stages ◽  
Deformation Approach ◽  
Elastic Object

We introduce a new tool that assists artists in deforming an elastic object when it comes in intersection with a rigid one. As opposed to methods that rely on time-resolved simulations, our approach is entirely based on time-independent geometric operators. It thus restarts from scratch at every frame from a pair of objects in intersection and works in two stages: the intersected regions are first matched and a contact region is identified on the rigid object; the elastic object is then deformed to match the contact while producing plausible bulge effects with controllable volume preservation. Our direct deformation approach brings several advantages to 3D animators: it provides instant feedback, permits non-linear editing, allows for the replicability of the deformation in different settings, and grants control over exaggerated or stylized bulging effects.

scholarly journals Time resolved imaging of the non-linear bullet mode within an injection-locked nano-contact spin Hall nano-oscillator

2018 ◽  
Vol 113 (19) ◽  
pp. 192405 ◽  
Author(s):  
T. M. Spicer ◽  
P. S. Keatley ◽  
M. Dvornik ◽  
T. H. J. Loughran ◽  
A. A. Awad ◽  
...  
Keyword(s):  
Time Resolved ◽  
Non Linear ◽  
Time Resolved Imaging

scholarly journals Polariton lasing and energy-degenerate parametric scattering in non-resonantly driven coupled planar microcavities

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Krzysztof Sawicki ◽  
Thomas J. Sturges ◽  
Maciej Ściesiek ◽  
Tomasz Kazimierczuk ◽  
Kamil Sobczak ◽  
...  
Keyword(s):  
Incidence Angle ◽  
Three Dimensional ◽  
Logic Gates ◽  
Einstein Condensation ◽  
Pitaevskii Equation ◽  
Time Resolved ◽  
Non Linear ◽  
Parametric Scattering ◽  
Two Level Systems ◽  
Bose Einstein

Abstract Multi-level exciton-polariton systems offer an attractive platform for studies of non-linear optical phenomena. However, studies of such consequential non-linear phenomena as polariton condensation and lasing in planar microcavities have so far been limited to two-level systems, where the condensation takes place in the lowest attainable state. Here, we report non-equilibrium Bose–Einstein condensation of exciton-polaritons and low threshold, dual-wavelength polariton lasing in vertically coupled, double planar microcavities. Moreover, we find that the presence of the non-resonantly driven condensate triggers interbranch exciton-polariton transfer in the form of energy-degenerate parametric scattering. Such an effect has so far been observed only under excitation that is strictly resonant in terms of the energy and incidence angle. We describe theoretically our time-integrated and time-resolved photoluminescence investigations by an open-dissipative Gross–Pitaevskii equation-based model. Our platform’s inherent tunability is promising for construction of planar lattices, enabling three-dimensional polariton hopping and realization of photonic devices, such as all-optical polariton-based logic gates.

scholarly journals Lexsyg — A new system for luminescence research

2013 ◽  
Vol 40 (4) ◽  
pp. 220-228 ◽  
Author(s):  
Daniel Richter ◽  
Andreas Richter ◽  
Kay Dornich
Keyword(s):  
Optical Excitation ◽  
Luminescence Dating ◽  
Luminescence Spectra ◽  
Time Resolved ◽  
Luminescence Detection ◽  
Spatially Resolved ◽  
Rf Measurement ◽  
Non Linear ◽  
Fundamental Research ◽  
Temperature Constant

Abstract The newly developed lexsyg system by Freiberg Instruments is a versatile luminescence reader, suited for research on the luminescence of materials, fundamental research in luminescence dating, but also for routine mass measurements in retrospective dosimetry as well as in dating application. The 80 sample storage wheel is disconnected from the measurement chamber and therefore crosstalk of optical stimulation is absent and cross-irradiation is negligible from the α- and β-sources, which are providing very uniform irradiations, with the latter especially designed for radiofluores-cence (RF) measurement. Optical excitation sources and filter wheels to vary detection wavelengths can be programmed to change at almost any time within measurement sequences, including the auto-mated change of an optional wheel holding up to four different detectors. Thermoluminescence meas-urements and preheating are possible with a versatile heater, which can be programmed for linear or non-linear heating or cooling, as well as holding a temperature constant. Rates as well as durations can be varied, together with individual ramping, staging and cooling for an almost unlimited number of steps. Violet- and IR-lasers, green and blue LED-arrays can be operated in continuous (CW) or modulated mode (linear/non-linear), and optionally for pulsed as well as time resolved luminescence detection. Six arrays of power LEDs allow the simulation of different bleaching regimes (‘solar simu-lator’), while luminescence detection can be achieved by a variety of photomultiplier tubes and by CCD cameras for spatially resolved measurements and luminescence spectra.

Non-Linear Density Dependent Upconversion Luminescence Enhancement of β-NaYF4: Yb3+: Er3+ Nanoparticles on Random Ag Nanowire Aggregates

MRS Advances ◽  
2016 ◽  
Vol 1 (38) ◽  
pp. 2677-2682
Author(s):  
Amy Hor ◽  
Quoc Anh N. Luu ◽  
P. Stanley May ◽  
Mary Berry ◽  
Steve Smith
Keyword(s):  
Statistical Analysis ◽  
Surface Coverage ◽  
Upconversion Luminescence ◽  
Time Resolved ◽  
Luminescence Enhancement ◽  
Density Dependent ◽  
Nanowire Surface ◽  
Non Linear ◽  
Spectrally Resolved ◽  
Ag Nanowire

ABSTRACTSpectroscopic imaging and statistical analysis of NIR-to-visible upconversion luminescence (UCL) from β-NaYF4:Yb3+:Er3+ upconverting nanoparticles (UCNPs) supported on a series of random Ag nanowire aggregates reveals a density dependent UCL enhancement. Statistical analysis of the spectrally resolved upconversion images shows a non-linear dependence of upconversion luminescence enhancement with Ag nanowire surface coverage. A maximum average enhancement of 5.8× was observed for 58% surface coverage. Based on the empirically determined trend with density, it is estimated that up to 20× upconversion luminescence enhancement can be achieved at 100% surface coverage, even at high excitation intensity. This projection is commensurate with the 20× enhancement ratio observed for select locations within the imaged micro-ensemble. Time-resolved emission of the UC luminescence from UCNPs on the Ag nanowire aggregates confirms the surface plasmon effects on the UCNPs kinetics. Such Ag nanowire aggregates show potential as a scalable and relatively simple metal-enhanced upconversion substrate.

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