Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 39, Pages 35863-35870Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b10354
Keywords
bismuth thin film; nonlinear optics; ultrafast photonics; broadband response; mid-infrared
Funding
- National Natural Science Foundation of China (NSFC) [11574079, 61475102, 61775056]
- Natural Science Foundation of Hunan Province [2017JJ111013]
- Research Fund of Science and Technology on Plasma Physics Laboratory [6142A0403050717]
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Bismuth (Bi), a topological material, where many interesting condensed matter phenomena have been observed, possesses unique physical properties when its thickness is reduced to thin film. Here, we prepared the highly stable, single-crystalline, continuous Bi thin film via the vapor deposition (VD) method and found that the Bi thin film can exhibit broadband, ultrafast nonlinear optical response with low saturable intensity ranging from the near infrared to mid -infrared spectral range under strong excitation. Moreover, we demonstrated that the Bi thin film was favorable to act as a nonlinear pulse modulator toward a high performance pulsed laser operating in optical communication and mid-infrared wavelengths. The experimental results highlight the prospects of Bi thin film as broadband pulsed modulators and may open new avenues toward advanced Bi-based broadband photonic devices.
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