A5074518543- Laser-Matter Interactions and Applications
- Plasmonic and Surface Plasmon Research
- Advanced Electron Microscopy Techniques and Applications
- Strong Light-Matter Interactions
- Spectroscopy and Quantum Chemical Studies
- 2D Materials and Applications
- Molecular Junctions and Nanostructures
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Fiber Laser Technologies
- Nonlinear Optical Materials Studies
- Advanced Fluorescence Microscopy Techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
- Electron and X-Ray Spectroscopy Techniques
- Quantum Information and Cryptography
- MXene and MAX Phase Materials
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Laser-Plasma Interactions and Diagnostics
- Advanced biosensing and bioanalysis techniques
- Nanowire Synthesis and Applications
- Thermal Radiation and Cooling Technologies
- Surface and Thin Film Phenomena
- Ga2O3 and related materials
- Atomic and Molecular Physics
- Mechanical and Optical Resonators
Lund University
2019-2024
Abstract The integration of metallic plasmonic nanoantennas with quantum emitters can dramatically enhance coherent harmonic generation, often resulting from the coupling fundamental fields to higher-energy, electronic or excitonic transitions emitters. ultrafast optical dynamics such hybrid plasmon–emitter systems have rarely been explored. Here, we study those by interferometrically probing nonlinear emission individual porous gold nanosponges infiltrated zinc oxide (ZnO) Few-femtosecond...
Molecular aggregates on plasmonic nanoparticles have emerged as attractive systems for the studies of polaritonic light-matter states, called plexcitons. Such are tunable, scalable, easy to synthesize, and offer sub-wavelength confinement, all while giving access ultrastrong coupling regime, promising a plethora applications. However, complexity these materials prevented understanding their excitation relaxation phenomena. Here, we follow pathways in plexcitons conclude that metal destroys...
Hot electron relaxation and transport in nanostructures involve a multitude of ultrafast processes whose interplay relative importance are still not fully understood, but which relevant for future applications areas such as photocatalysis optoelectronics. To unravel these processes, their dynamics both time space must be studied with high spatiotemporal resolution structurally well-defined nanoscale objects. We employ time-resolved photoemission microscopy to image the photogenerated hot...
Michelson interferometers have been routinely used in various applications ranging from testing optical components to interferometric time-resolved spectroscopy measurements. Traditionally, plate beamsplitters are employed redistribute radiation between the two arms of an interferometer. However, such interferometer is susceptible relative phase fluctuations resulting vibrations beamsplitter. This drawback circumvented diffraction-grating-based interferometers, which especially beneficial...
The generation and characterization of ultrashort laser pulses in the deep ultraviolet spectral region is challenging, especially at high pulse repetition rates low energies. Here, we combine achromatic second harmonic adaptive compression for efficient sub-10 fs a rate 200 kHz. Furthermore, simplify scheme reach durations ≈10 without use optics. We demonstrate straight-forward tuning from 250 to 320 nm, broad spectra up 63 nm width, excellent stability robustness against misalignment. These...
The hybrid combination of two-dimensional (2D) transition metal dichalcogenides (TMDs) and plasmonic materials open up novel means (ultrafast) optoelectronic applications manipulation nanoscale light–matter interaction. However, control the excitations by TMDs themselves has not been investigated. Here, we show that ultrathin 2D WSe2 crystallites permit spatially controlled coherent excitation surface plasmon polaritons (SPPs) on smooth Au films. resulting complex interference patterns are...
Broadband femtosecond laser pulses manipulated by pulse shapers based on a liquid crystal spatial light modulator (LC-SLM) inevitably experience periodic spectral distortions due to Fabry-Perot interference effects within the LC-SLM. We present method, applicable phase and amplitude dual LC-SLMs, that enables calibration suppression of undesired intensity modulations in non-iterative fashion. demonstrate method considerably improves shaping fidelity without compromising properties.
Abstract Electrons photoemitted by extreme ultraviolet attosecond pulses derive spatially from the first few atomic surface layers and energetically valence band highest orbitals. As a result, it is possible to probe emission dynamics narrow 2D region in presence of optical fields, as well obtain elemental specific information. However, combining this with spatially‐resolved imaging long‐standing challenge because large inherent spectral width pulses, difficulty making them at high...
Two-dimensional semiconducting transition metal dichalcogenides are promising materials for optoelectronic applications due to their strongly bound excitons. While bright excitons have been thoroughly scrutinized, dark much less investigated, as they not directly observable with far-field spectroscopy. However, nonzero momenta, significant requiring long-range transport or coupling external fields. We access such in WS2 monolayer using transient photoemission electron microscopy...
Two-dimensional semiconductors based on transition metal dichalcogenides are promising for electronics and optoelectronics applications owing to their properties governed by strongly-bound bright dark excitons. Momentum-forbidden excitons have recently received attention as better alternatives long-range transport. However, accessing the dynamics of is challenging experimentally. The most direct, but very complicated, experiment transient angle-resolved photoemission electron spectroscopy:...
Electrons photoemitted by extreme ultraviolet attosecond pulses derive spatially from the first few atomic surface layers and energetically valence band highest orbitals. As a result, it is possible to probe emission dynamics narrow two-dimensional region in presence of optical fields as well obtain elemental specific information. However, combining this with spatially-resolved imaging long-standing challenge because large inherent spectral width difficulty making them at high repetition...
Molecular aggregates on plasmonic nanoparticles have emerged as attractive systems for the studies of cavity quantum electrodynamics. They are highly tunable, scalable, easy to synthesize and offer sub-wavelength confinement, all while giving access ultrastrong light-matter coupling regime at room temperature promising a plethora applications. However, complexity both molecular aggregate nanoparticle introduces many more processes affecting excitation its relaxation, than present in...