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bismuth thin films 1centrosymmetric materials 1nonlinear transport 1quantum metric 1third-harmonic generation 1

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physics.optics2025

Band Geometry Induced Third-Harmonic Generation

Sanjay Sarkar, Debottam Mandal, Amit Agarwal

Third-harmonic generation (THG) is a key nonlinear optical process for ultrafast imaging, terahertz (THz) signal generation, and symmetry-sensitive probes, often dominating in cent…