| 1. |
- de Andres Gonzalez, Aitor, 1992-, et al.
(author)
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Vacuum laser acceleration of electrons injected from nanotips
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - : Institute of Electrical and Electronics Engineers (IEEE). - 9798350345995 - 9798350346008
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Conference paper (peer-reviewed)abstract
- Vacuum laser acceleration (VLA) is a paradigm that utilizes the strong fields of focused laser light to accelerate electrons in vacuum. Despite its conceptual simplicity and a large existing collection of theoretical studies, realizing VLA in practice has proven remarkably challenging due to the difficulties associated with efficient injection: the electrons to be accelerated must be pre-energized and temporally compressed below an optical half-cycle before timely entering the rapidly oscillating fields of the laser. Therefore, only a handful of experiments have been published up to date, and a knowledge gap remains [1-3].
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| 2. |
- Flodgren, Vidar, et al.
(author)
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III-V nanowire based neuromorphic nanophotonic circuits
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Conference paper (peer-reviewed)abstract
- Combining highly efficient nanophotonic structures into artificial neural networks hold significant promise for superior hardware solutions [1]. Well-defined circuit architectures and concepts, with limited size and clear functionality are useful to develop and verify such novel concepts. Insects are capable of amazing autonomous feats well beyond current computers, such as navigating across hundreds of kilometres of unfamiliar terrain, with only a few drops of nectar as energy supply. One important module of the insect brain, conserved across species with vastly different lifestyles, is the central complex navigation circuit. This has been distilled to its fundamental neuroarchitecture and the function of a number of its components into a biologically constrained computational model [2].
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| 3. |
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| 4. |
- Hoff, D., et al.
(author)
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Direct CEP Stabilization of a high-repetition rate, few-cycle OPCPA chain with a single feedback loop, employing a Stereo-ATI
- 2023
-
In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Conference paper (peer-reviewed)abstract
- Today's Carrier-Envelope Phase (CEP) stabilizations of mode-locked oscillators widely used in attosecond science and frequency metrology rely on octave spanning frequency combs and the detection of beating between the blue end and the frequency doubled red end of the same spectrum. This technique was established by the seminal works of Hänsch and co-workers [1], demonstrating the stabilization of optical frequencies from such a frequency comb by transferring the slippage of the CEP (or carrier-envelope offset frequency) into a detectable radio frequency by f-2f interferometry. The requirement of an octave spanning spectrum means that usually some kind of super-continuum generation is involved, which, in practice often is a fragile scheme since wide band oscillators are very prone to instabilities and noise.
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| 5. |
- Hoff, D., et al.
(author)
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Quantum Beat Spectroscopy of Helium Photoelectrons
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Conference paper (peer-reviewed)abstract
- The availability of broadband extreme ultraviolet light sources allows for investigation of electron wave-packets from high lying bound states in atoms [1,2]. The dynamics of these states can be mapped out in the ionization continuum with an overlapping infrared field, which may also uncover new, light induced, dressed states [3]. Here, we carry out a complete characterization of these electron wave-packets using a small number of attosecond pulses.
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| 6. |
- Kuttruff, Joel, et al.
(author)
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Ultrafast Dynamics of Molecular Polaritons in Photoswitch Nanoantennas
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - : Institute of Electrical and Electronics Engineers (IEEE). - 9798350345995
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Conference paper (peer-reviewed)abstract
- We study ultrafast dynamics of photocromic molecules both weakly and strongly coupled to plasmonic nanoantennas. Experiments, verified by quantum modelling, reveal subps collapse of molecular polaritons to intramolecular dynamics induced by interaction with the plasmons.
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| 7. |
- Lanzavecchia, German, et al.
(author)
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Plasmon-driven photochemistry for metallic nanopore arrays fabrication
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - : IEEE. - 9798350345995 - 9798350346008
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Conference paper (peer-reviewed)abstract
- We show a process for the fabrication of nanopores arrays via photocatalysis triggered by electromagnetic field enhancement in plasmonic structures immersed in metallic salt solutions and generating hotspots causing pore diameter reduction below 5 nm.
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| 8. |
- Nandi, Saikat, et al.
(author)
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Unraveling Rabi dynamics with a seeded FEL at XUV wavelength
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Conference paper (peer-reviewed)abstract
- Rabi oscillations, a prominent feature of coherent light-matter interaction arise when a two-level system interacts periodically with an external electromagnetic field [1]. Despite being a cornerstone in quantum physics, they are usually studied in the long-wavelength region, ranging from mid-infrared to visible. Here, we demonstrate that intense femtosecond extreme-ultraviolet (XUV) pulses from FERMI seeded free-electron laser [2] can drive Rabi oscillations between the two levels: 1s2 and 1s4p in helium.
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| 9. |
- Olofsson, Edvin, et al.
(author)
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Photoelectron Signatures of Nonperturbative Dynamics in Resonant Two-photon Ionization of Helium
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Conference paper (peer-reviewed)abstract
- When an atom is driven by a laser field with a photon energy that is nearly resonant with an atomic transition, it can undergo periodic population transfers between the ground and excited state, known as Rabi oscillations [1,2]. The aim of this work is to study photoionization from atoms for parameters accessible to a free-electron laser (FEL) [3]. Using time dependent perturbation theory to model photoionization from a Rabi oscillating atom, we have shown that in addition to the expected pathway of ionization from the excited state, non-resonant two-photon ionization will have a comparable amplitude at intensities on the order of 1013 W/cm2 [3].
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| 10. |
- Rebolledo Salgado, Israel, 1992, et al.
(author)
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Active Feedback Stabilization of Super-efficient Microcombs
- 2023
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In: 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). - : Institute of Electrical and Electronics Engineers (IEEE). - 2833-1052. - 9798350345995
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Conference paper (peer-reviewed)abstract
- We report the long-term operation of a super-efficient microcomb. We use the soliton power to maintain a fixed pump detuning. The microcomb operates over 25 hours using a thermal control in a packaged module.
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