Giant optical second- and third-order nonlinearities at a telecom wavelength

A material platform that excels in both optical second- and third-order nonlinearities at a telecom wavelength is theoretically and experimentally demonstrated. In this TiN-based coupled metallic quantum well structure, electronic subbands are engineered to support doubly resonant inter-subband tran...

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Veröffentlicht in:Optics letters 2024-07, Vol.49 (13), p.3725
Hauptverfasser: Chen, Ching-Fu, Tian, Fanglin, Zhou, Junxiao, Wagner, Jackson C, Xiong, Wei, Liu, Zhaowei
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Sprache:eng
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Zusammenfassung:A material platform that excels in both optical second- and third-order nonlinearities at a telecom wavelength is theoretically and experimentally demonstrated. In this TiN-based coupled metallic quantum well structure, electronic subbands are engineered to support doubly resonant inter-subband transitions for an exceptionally high second-order nonlinearity and provide single-photon transitions for a remarkable third-order nonlinearity within the 1400-1600 nm bandwidth. The second-order susceptibility χ reaches 2840 pm/V at 1440 nm, while the Kerr coefficient n arrives at 2.8 × 10 cm /W at 1460 nm. The achievement of simultaneous strong second- and third-order nonlinearities in one material at a telecom wavelength creates opportunities for multi-functional advanced applications in the field of nonlinear optics.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.528340