Broadband saturable absorption of indium tin oxide nanocrystals toward mid-infrared regime

We experimentally demonstrate the ultrabroadband optical nonlinearity of indium tin oxide nanocrystals (ITO NCs) in the mid-infrared regime. Especially, the ITO NCs show considerable saturation absorption behavior with large modulation depth covering the spectral range from 2-µm to 10-µm wavelength....

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Veröffentlicht in:Optics letters 2022-12, Vol.47 (24), p.6413-6416
Hauptverfasser: Huang, Jing, Liu, DongYang, Chen, Longlong, Li, Ning, Miao, Lili, Zhao, Chujun
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Sprache:eng
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Zusammenfassung:We experimentally demonstrate the ultrabroadband optical nonlinearity of indium tin oxide nanocrystals (ITO NCs) in the mid-infrared regime. Especially, the ITO NCs show considerable saturation absorption behavior with large modulation depth covering the spectral range from 2-µm to 10-µm wavelength. We also demonstrate the application of the optical nonlinearity to successfully modulate the erbium-doped fluoride fiber laser to deliver a nanosecond pulse with a signal-to-noise ratio over 43 dB at 2.8-µm wavelength. The results provide a promising platform for the development of ITO-based broadband and robust optoelectronic devices toward the deep mid-infrared spectral range.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.478536