Fourier optical manipulation in differential microscopy and temporal pulse shaping

Ghosh, Sayan (2023) Fourier optical manipulation in differential microscopy and temporal pulse shaping. Masters thesis, Indian Institute of Science Education and Research Kolkata.

[img] Text (Ms dissertation of Sayan Ghosh (18MS076))
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In this thesis, we built a pulse shaper with a 2D SLM and demonstrated its capability to shape the spectral phase and intensity of picosecond laser pulses. To the best of our knowledge, this is the first report of spectral phase and amplitude shaping of a 2 ps laser pulse with a 2D SLM.We calibrated our shaping capabilities in a fringe-resolved autocorrelation setup. Furthermore, we investigated the control of nonlinear absorption process in a semiconductor photodiode, by measuring the photocurrent. Although we only studied nonresonant TPA, the principles are applicable in other two or many-photon processes in interaction with ultrashort pulses, like second harmonic generation, parametric up and down conversion, Raman transitions, etc. Results demonstrated in this thesis also paves the way for generating (temporal) square pulses with ultrashort rise times, which are useful in certain advanced excitation protocols for quantum dots.

Item Type: Thesis (Masters)
Additional Information: Supervisors: Supervisors: Prof. GregorWeihs, Institut für Experimentalphysik, Universität Innsbruck; Prof. Nirmalya Ghosh; Co-Supervisor: Dr. Vikas Remesh, Universität Innsbruck
Uncontrolled Keywords: Contrast Imaging; Differential Microscopy; Fourier Image; Picosecond Pulse Shaping; Pulse Shaper
Subjects: Q Science > QC Physics
Divisions: Department of Physical Sciences
Depositing User: IISER Kolkata Librarian
Date Deposited: 05 Jan 2024 11:46
Last Modified: 05 Jan 2024 11:46

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