About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Growth and Transfer of Hematite Thin Films for Pump–Probe Spectroscopy |
| Author(s) |
Fatma Mahmoud Rabie Zeidan Ali, Jennifer Fowlie |
| On-Site Speaker (Planned) |
Fatma Mahmoud Rabie Zeidan Ali |
| Abstract Scope |
Freestanding oxide thin film membranes are of increasing interest for ultrafast optical techniques such as pump–probe spectroscopy, where direct access to high-quality materials is essential. In this work, we focus on hematite (Fe₂O₃) thin films and explore approaches for their growth and transfer. The study begins with pulsed laser deposition of hematite on LaAlO₃ substrates, incorporating sacrificial layers such as Sr₃Al₂O₆ (SAO) and CaAl₂O₄ (CAO). Particular attention is given to the role of substrate orientation and sacrificial layer composition in addressing challenges related to lattice mismatch and film release. The transfer process is then carried out using a poly(methyl methacrylate) support layer, followed by dissolution of the sacrificial layer to obtain freestanding membranes, which are then placed onto silicon substrates. Current efforts are directed toward refining both growth and transfer steps to enable subsequent pump–probe measurements of ultrafast carrier dynamics in hematite films. |