R. Weigand
YOU?
Author Swipe
View article: Intrinsic Optical Response of Levitating Upconverting Single Particles
Intrinsic Optical Response of Levitating Upconverting Single Particles Open
View article: Using ensembles of dielectric nanoparticles in the FROG technique
Using ensembles of dielectric nanoparticles in the FROG technique Open
View article: Few-cycle pulse retrieval using amplitude swing technique
Few-cycle pulse retrieval using amplitude swing technique Open
Ultrashort pulses have garnered significant attention across various scientific disciplines and applications. In this paper, we demonstrate that the recently introduced amplitude swing technique is a robust method for characterizing pulses…
View article: Interaction and aggregation of iron oxide γ-Fe2O3 nanoparticles with a 1,8-Naphthalimide derivative
Interaction and aggregation of iron oxide γ-Fe2O3 nanoparticles with a 1,8-Naphthalimide derivative Open
The interaction of a fluorescent molecule 4-methoxy-N-[2-(1-pyrrolidine)ethyl]-1,8-naphthalimide (MNN) with iron oxide γ-Fe2O3 (maghemite) nanoparticles (IONPs) in water is demonstrated through fluorescence, Nuclear Magnetic Resonance (1H …
View article: Multifunctional platform for photothermal therapy combined with luminescence nanothermometry probes
Multifunctional platform for photothermal therapy combined with luminescence nanothermometry probes Open
The design of multifunctional magnetic nanoparticles (NPs) that can generate and monitor heat release in real-time during thermal therapy is a major challenge in nanomedicine. In this work, a trimodal system that combines magnetic hyperthe…
View article: In-Situ Temporal Characterization of Chirped Ultra-Broadband Laser Pulses Exciting a Dual-Light Emitter Er3+-Doped Perovskite
In-Situ Temporal Characterization of Chirped Ultra-Broadband Laser Pulses Exciting a Dual-Light Emitter Er3+-Doped Perovskite Open
We take advantage of the dual emission properties of up-conversion fluorescence (UCF) and second harmonic generation (SHG) in Er3+-doped perovskite Na0.95Er0.05Nb0.9Ti0.1O3 to fully temporally characterize the ultrashort laser pulse that e…
View article: On the generality of measuring ultrabroad-band ultrashort laser pulses with the d-scan technique using ensembles of dielectric nano- and microparticles
On the generality of measuring ultrabroad-band ultrashort laser pulses with the d-scan technique using ensembles of dielectric nano- and microparticles Open
We demonstrate that temporal characterization of ultrabroadband laser pulses (∼ 7 fs) through the d-scan technique can be implemented using ensembles of SHG micro and/or nanocrystals independently of their crystal size and/or composition. …
View article: Full Temporal Characterization of Ultrabroadband Few-Cycle Laser Pulses Using Atomically Thin WS<sub>2</sub>
Full Temporal Characterization of Ultrabroadband Few-Cycle Laser Pulses Using Atomically Thin WS<sub>2</sub> Open
Nowadays, the accurate and full temporal characterization of ultrabroadband few-cycle laser pulses with pulse durations below 7 fs is of great importance in fields of science that investigate ultrafast dynamic processes. There are several …
View article: Powerful algebraic model to design Q-switched lasers using saturable absorbers
Powerful algebraic model to design Q-switched lasers using saturable absorbers Open
Using the rate equations and their stability analysis, an algebraic model has been developed to predict the values of characteristic magnitudes of the output of a laser operating in passive Q-switched regime, such as peak power, temporal p…
View article: Towards the Standardization of Photothermal Measurements of Iron Oxide Nanoparticles in Two Biological Windows
Towards the Standardization of Photothermal Measurements of Iron Oxide Nanoparticles in Two Biological Windows Open
A systematic study on laser-induced heating carried out in two biological windows (800 nm and 1053 nm) for Fe3O4 nanoparticles in water suspension showed evidence of the strong dependence of the specific absorption rate (SAR) on extrinsic …
View article: Dual Self-Diffraction Dispersion-scan for Measuring Spatially Inhomogeneous Ultrashort Pulses
Dual Self-Diffraction Dispersion-scan for Measuring Spatially Inhomogeneous Ultrashort Pulses Open
We develop a self-diffraction dispersion-scan method that simultaneously measures two distinct spatial portions of an ultrashort light pulse and apply it to the temporal characterization of 400-nm broadband ultraviolet pulses generated by …
View article: Solar thermoelectricity via advanced latent heat storage: A cost-effective small-scale CSP application
Solar thermoelectricity via advanced latent heat storage: A cost-effective small-scale CSP application Open
We are developing a novel concentrating solar electricity-generating technology that is both modular and dispatchable. Solar ThermoElectricity via Advanced Latent heat Storage (STEALS) uses concentrated solar flux to generate high-temperat…
View article: Dispersion-scan Measurements of the Multiplate Continuum Process
Dispersion-scan Measurements of the Multiplate Continuum Process Open
View article: Q-Switched Operation with Carbon-Based Saturable Absorbers in a Nd:YLF Laser
Q-Switched Operation with Carbon-Based Saturable Absorbers in a Nd:YLF Laser Open
We have numerically studied the influence of the absorption modulation depth of carbon-based saturable absorbers (graphene and carbon nanotubes (CNTs)) on the Q-switched regime of a diode-pumped Nd:YLF laser. A short-length cavity was used…
View article: Fundamentals of Highly Non-Degenerate Cascaded Four-Wave Mixing
Fundamentals of Highly Non-Degenerate Cascaded Four-Wave Mixing Open
By crossing two intense ultrashort laser pulses with different colors in a transparent medium, like a simple piece of glass, a fan of multicolored broadband light pulses can be simultaneously generated. These newly generated pulses are emi…
View article: On the Q-switched operation of Titanium:Sapphire lasers using a graphene-based saturable absorber mirror
On the Q-switched operation of Titanium:Sapphire lasers using a graphene-based saturable absorber mirror Open
We numerically demonstrate Q-switched operation of Titanium:Sapphire lasers using mono and multilayer graphene, deposited on a totally reflecting end mirror as a saturable absorber. Output energies, pulse duration and repetition frequencie…
View article: Optical transmission properties of Pentelic and Paros marble
Optical transmission properties of Pentelic and Paros marble Open
Ancient Greek and Roman sources report that the statue of Zeus in Olympia had a head, and in particular eyes, similar to the description of Zeus by Homer, so we think that the statue was visible to the human eye. Since the temple was 12 m …