About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Solid-State Optical Materials and Luminescence Properties
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| Presentation Title |
Efficient generation of high harmonic generation and polarization-dependent nonlinearity in van der Waals material: AgScP₂S₆ |
| Author(s) |
Mohamed Yaseen Noor, Ryan Siebenaller, Conrad Kuz, Simin Zhang, Adam Fisher, Rahul Rao, Emmanuel Rowe, Bing Lv, Benjamin Conner, Michael Susner, Enam Chowdhury |
| On-Site Speaker (Planned) |
Mohamed Yaseen Noor |
| Abstract Scope |
Nonlinear optical materials are essential for ultrafast signal processing, frequency conversion, and polarization-sensitive photonic devices. We investigate second/third-harmonic generation (SHG/THG) in the van der Waals layered material AgScP₂S₆ to evaluate its nonlinear optical properties. Linear optical constants extracted via spectroscopic ellipsometry inform harmonic generation modeling. Polarization-resolved SHG/THG exhibit pronounced anisotropy, well-described by theoretical fits to χ(2) and χ(3) tensor components. Single-crystal X-ray diffraction and nonlinear optical analysis confirm a non-centrosymmetric P31c space group, enabling strong second-order responses. Exceptionally high nonlinear susceptibilities are observed, with χ(2) ≈ 10⁻⁸ m/V and χ(3) ≈ 10⁻¹⁷ m²/V², surpassing values in similar 2D materials. Temperature-dependent measurements (300–25 K) show exponential decay in harmonic signals, attributed to reduced carrier mobility, with no evidence of phase transitions. Polarization state studies reveal SHG enhancement under circular polarization and THG maximization under linear excitation. These findings position AgScP₂S₆ as a high-performance, thermally stable nonlinear medium for integrated photonics. |