Experimental study demonstrates strong nonlinear absorption and low optical limiting thresholds in perovskite quantum dot composite films, highlighting their potential for laser protection.
With high-power lasers widely used, protecting optical systems and human eyes from laser damage is crucial. In this work, using the high adhesive and low-melting-point polymer TPU as the matrix, we fabricated MAPbBr 3 PQD/TPU composite film. The film exhibits strong nonlinear absorption and optical limiting properties. The nonlinear absorption and nonlinear refraction coefficients are 1.2 × 10 −12 (m/W) and −6 × 10 −19 (m 2 /W), respectively. The optical limiting threshold is 0.11 J/cm 2 . Furthermore, the film demonstrates superior adhesion. These properties make the film highly promising for optical system laser protection applications.
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Wang et al. (2026) studied this question.
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