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Application of Attosecond Techniques to Condensed Matter Systems

Smith, Gregory J
http://orcid.org/0000-0002-2899-9595
http://rave.ohiolink.edu/etdc/view?acc_num=osu1608496995249541

Abstract Details

2021, Doctor of Philosophy, Ohio State University, Physics.
In this thesis, we lay the groundwork for performing attosecond transient absorption spectroscopy (ATAS) measurements in the condensed phase using mid-infrared (MIR) lasers. This was accomplished by designing, building and testing several pieces of home-built experimental equipment, including a MIR / extreme ultraviolet (XUV) Mach-Zehnder interferometer and a two-dimensional XUV spectrometer. A home-made bright XUV light source was designed and demonstrated to be nearly two orders of magnitude brighter than existing sources. Finally, the equipment was used to study ultrafast dynamics in germanium, a technologically important indirect bandgap semiconductor. This thesis is organized as follows. Chapter 1 introduces the relevant background, including ultrafast dynamics and the tools required to observe them. Chapter 2 details the commercial laser system, the home-built transient absorption beamline (TABLe) and the XUV spectrometer. In Chapter 3, we design and optimize the XUV light source for high flux, which is a general requirement for ATAS measurements and especially needed at longer wavelengths with poor high harmonic generation (HHG) quantum efficiency. Also covered in Chapter 3 are basic diagnostics of the XUV & IR optics, as well as our XUV detector. In Chapter 4, we present the results of a MIR ATAS experiment in germanium, an experimental first. Chapter 5 concludes the dissertation with a roadmap for future condensed matter studies. An appendix provides instructions on how to operate some aspects of the home-built experimental apparatus.
Louis DiMauro (Advisor)
Robert Baker (Committee Member)
Jay Gupta (Committee Member)
Yuri Kovchegov (Committee Member)
219 p.
Condensed Matter Physics; Optics; Physics
ultrafast; high harmonic generation; HHG; transient absorption; spectroscopy; attosecond; femtosecond; picosecond

Recommended Citations

Citations

  • Smith, G. J. (2021). Application of Attosecond Techniques to Condensed Matter Systems [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1608496995249541

    APA Style (7th edition)

  • Smith, Gregory. Application of Attosecond Techniques to Condensed Matter Systems. 2021. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1608496995249541.

    MLA Style (8th edition)

  • Smith, Gregory. "Application of Attosecond Techniques to Condensed Matter Systems." Doctoral dissertation, Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1608496995249541

    Chicago Manual of Style (17th edition)

osu1608496995249541
169
© 2021, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.