Spatial and temporal aspects of intense attosecond pulses for pump-probe experiments
(2019) In Lund Reports on Atomic Physics- Abstract
- Nuclear and electronic dynamics in atoms and molecules are the foundation of many physical processes and chemical reactions. Often, these dynamics take place on timescales so much shorter than those commonly encountered that they are called ultrafast.
In order to study ultrafast phenomena, time-resolved techniques such as pump-probe experiments, involving ultrafast light pulses, are necessary. For these experiments to be successful, the properties of ultrafast light pulses must be carefully controlled and examined in order to discern their influence on the experiment.
This thesis deals with the spatial and temporal properties of XUV light, generated through the process of high-order harmonic generation in... (More) - Nuclear and electronic dynamics in atoms and molecules are the foundation of many physical processes and chemical reactions. Often, these dynamics take place on timescales so much shorter than those commonly encountered that they are called ultrafast.
In order to study ultrafast phenomena, time-resolved techniques such as pump-probe experiments, involving ultrafast light pulses, are necessary. For these experiments to be successful, the properties of ultrafast light pulses must be carefully controlled and examined in order to discern their influence on the experiment.
This thesis deals with the spatial and temporal properties of XUV light, generated through the process of high-order harmonic generation in gases, using an intense IR laser beam. The influence of the spatial properties of this generating laser on the XUV has been studied, as has the influence of the XUV light's spatial properties on its focusability and peak intensity.
The generated high-order harmonics are also used to study physical phenomena such as multiphoton ionization, something that requires high intensities. An instrument for simultaneous studies of ions and electrons produced by photoionization is also presented.
The efforts towards ultrafast pump-probe experiments include designs for interferometer setups to enable these experiments. Some preliminary results of interferometer testing are also given, including a proof of principle of XUV-IR pump-probe experiments on the Lund Laser Centre intense XUV beamline. (Less) - Abstract (Swedish)
- Kärn- och elektrondynamik i atomer och molekyler är grunden för många fysiska processer och kemiska reaktioner. Ofta händer denna dynamik på tidsskalor som är så korta att de kallas ultrasnabba.
För att studera ultrasnabba fenomen behövs tekniker som pump-prob-experiment med ultrasnabba ljuspulser. För att dessa experiment ska lyckas måste ljuspulsernas egenskaper noga studeras och styras för att deras inverkan på experimentet ska kunna avgöras.
Den här avhandlingen behandlar de spatiella och tidsmässiga egenskaperna hos XUV-ljus skapat genom högre ordningens övertongenerering i gaser, med hjälp av en intensiv IR-laser. Den inverkan som denna lasers spatiella egenskaper har på XUV-ljuset har studerats, så väl som... (More) - Kärn- och elektrondynamik i atomer och molekyler är grunden för många fysiska processer och kemiska reaktioner. Ofta händer denna dynamik på tidsskalor som är så korta att de kallas ultrasnabba.
För att studera ultrasnabba fenomen behövs tekniker som pump-prob-experiment med ultrasnabba ljuspulser. För att dessa experiment ska lyckas måste ljuspulsernas egenskaper noga studeras och styras för att deras inverkan på experimentet ska kunna avgöras.
Den här avhandlingen behandlar de spatiella och tidsmässiga egenskaperna hos XUV-ljus skapat genom högre ordningens övertongenerering i gaser, med hjälp av en intensiv IR-laser. Den inverkan som denna lasers spatiella egenskaper har på XUV-ljuset har studerats, så väl som XUV-ljusets spatiella egenskaper och hur de påverkar dess fokuserbarhet och intensitet.
De skapade övertonerna har också använts för att studera fysiska fenomen som multifotonjonisering, något som kräver hög intensitet. Ett instrument för samtidiga studier av joner och elektroner frigjorda genom fotojonisering uppvisas också i avhandlingen.
Arbetet för att utföra ultrasnabba pump-prob-experiment inkluderar ritningen av interferometrar som möjliggör dessa experiment. Några tidiga resultat av att testa en av interferometrarna visas också, däribland en demonstration av pump-prob-experiment med XUV- och IR-ljus på Lunds lasercentrums (LLC) strålrör för intensivt XUV-ljus. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/e0078770-83c9-4201-9787-93a35ad76bb3
- author
- Wikmark, Hampus LU
- supervisor
-
- Per Johnsson LU
- Anne L'Huillier LU
- opponent
-
- Professor Mével, Eric, Université de Bordeaux, France
- organization
- alternative title
- Spatiella och tidsmässiga aspekter av intensiva attosekundpulser för pump-prob-experiment
- publishing date
- 2019-04-23
- type
- Thesis
- publication status
- published
- subject
- keywords
- ultrafast lasers, ultrafast optics, attosecond pulses, pump-probe experiments, XUV light, XUV focusing, wavefront sensing, XUV optics, X-ray optics, Fysicumarkivet A:2019:Wikmark, ultrasnabba lasrar, attosekundspulser, pump-prob-experiment, XUV-ljus, vågfrontmätningar, XUV-optik, Röntgen-optik
- in
- Lund Reports on Atomic Physics
- issue
- 556
- pages
- 241 pages
- publisher
- Department of Physics, Lund University
- defense location
- Rydbergsalen, Fysicum, Professorsgatan 1, Lund University, Faculty of Engineering LTH
- defense date
- 2019-05-17 09:15:00
- ISSN
- 0281-2762
- ISBN
- 978-91-7895-043-0
- 978-91-7895-042-3
- language
- English
- LU publication?
- yes
- id
- e0078770-83c9-4201-9787-93a35ad76bb3
- date added to LUP
- 2019-04-10 14:04:16
- date last changed
- 2019-07-05 16:19:36
@phdthesis{e0078770-83c9-4201-9787-93a35ad76bb3, abstract = {{Nuclear and electronic dynamics in atoms and molecules are the foundation of many physical processes and chemical reactions. Often, these dynamics take place on timescales so much shorter than those commonly encountered that they are called ultrafast.<br/> <br/> In order to study ultrafast phenomena, time-resolved techniques such as pump-probe experiments, involving ultrafast light pulses, are necessary. For these experiments to be successful, the properties of ultrafast light pulses must be carefully controlled and examined in order to discern their influence on the experiment.<br/><br/> This thesis deals with the spatial and temporal properties of XUV light, generated through the process of high-order harmonic generation in gases, using an intense IR laser beam. The influence of the spatial properties of this generating laser on the XUV has been studied, as has the influence of the XUV light's spatial properties on its focusability and peak intensity.<br/> <br/> The generated high-order harmonics are also used to study physical phenomena such as multiphoton ionization, something that requires high intensities. An instrument for simultaneous studies of ions and electrons produced by photoionization is also presented.<br/> <br/> The efforts towards ultrafast pump-probe experiments include designs for interferometer setups to enable these experiments. Some preliminary results of interferometer testing are also given, including a proof of principle of XUV-IR pump-probe experiments on the Lund Laser Centre intense XUV beamline.}}, author = {{Wikmark, Hampus}}, isbn = {{978-91-7895-043-0}}, issn = {{0281-2762}}, keywords = {{ultrafast lasers; ultrafast optics; attosecond pulses; pump-probe experiments; XUV light; XUV focusing; wavefront sensing; XUV optics; X-ray optics; Fysicumarkivet A:2019:Wikmark; ultrasnabba lasrar; attosekundspulser; pump-prob-experiment; XUV-ljus; vågfrontmätningar; XUV-optik; Röntgen-optik}}, language = {{eng}}, month = {{04}}, number = {{556}}, publisher = {{Department of Physics, Lund University}}, school = {{Lund University}}, series = {{Lund Reports on Atomic Physics}}, title = {{Spatial and temporal aspects of intense attosecond pulses for pump-probe experiments}}, url = {{https://lup.lub.lu.se/search/files/62889948/Hampus_Wikmark_web.pdf}}, year = {{2019}}, }