Advanced Nonlinear Microscopy for Characterizing Novel Materials
Annurakshita, Shambhavee (2024)
Annurakshita, Shambhavee
Tampere University
2024
Tekniikan ja luonnontieteiden tohtoriohjelma - Doctoral Programme in Engineering and Natural Sciences
Tekniikan ja luonnontieteiden tiedekunta - Faculty of Engineering and Natural Sciences
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Väitöspäivä
2024-11-15
Julkaisun pysyvä osoite on
https://urn.fi/URN:ISBN:978-952-03-3637-0
https://urn.fi/URN:ISBN:978-952-03-3637-0
Tiivistelmä
The relentless advancement in materials science has fueled technological innovations, propelling the evolution of complex materials that are foundational to modern technology in fields such as optoelectronics and energy solutions. Traditional optical and electron microscopy methods, while foundational, face limitations in 3D optical sectioning, deep penetration, sample preparation, and potential sample damage. These limitations underscore a critical gap in our ability to non-invasively study the nanoscale structural and compositional variations in materials, particularly under real-time and in-situ conditions. Nonlinear optical (NLO) microscopy techniques, including third-harmonic generation (THG), second-harmonic generation (SHG), and multiphoton excitation fluorescence (MPEF), promise to overcome these challenges. They offer intrinsic sectional imaging capabilities, reduced photodamage, and non-invasive imaging without the need for labels. However, the mechanics and potential of these techniques are not yet fully understood in the context of novel material systems.
This thesis advances the application and understanding of NLO microscopy to study a variety of novel materials, enhancing material science through the development of innovative methodologies. Our research refines our understanding of how NLO responses are influenced by nanoscale variations and explores the practical applications of these findings. Key studies include: 1) Non-destructive visualization of photopolymerization processes using THG microscopy, 2) Enhanced detection of crystalline structures within photonic glasses via SHG microscopy, 3) Assessment of NLO properties in manganese-doped bismuth-based perovskite-inspired thin films through combined THG and MPEF techniques, and 4) Exploration of structural distortions and defects in bismuth-based perovskite inspired materials using multimodal NLO imaging for photonics applications. These studies contribute significantly to the characterization of materials, pushing the boundaries of current technology and laying a foundation for future advances in high-tech applications.
This thesis advances the application and understanding of NLO microscopy to study a variety of novel materials, enhancing material science through the development of innovative methodologies. Our research refines our understanding of how NLO responses are influenced by nanoscale variations and explores the practical applications of these findings. Key studies include: 1) Non-destructive visualization of photopolymerization processes using THG microscopy, 2) Enhanced detection of crystalline structures within photonic glasses via SHG microscopy, 3) Assessment of NLO properties in manganese-doped bismuth-based perovskite-inspired thin films through combined THG and MPEF techniques, and 4) Exploration of structural distortions and defects in bismuth-based perovskite inspired materials using multimodal NLO imaging for photonics applications. These studies contribute significantly to the characterization of materials, pushing the boundaries of current technology and laying a foundation for future advances in high-tech applications.
Kokoelmat
- Väitöskirjat [4891]