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

Chen, Ching-Fu; Tian, Fanglin; Zhou, Junxiao; Wagner, Jackson C.; Xiong, Wei; Liu, Zhaowei

doi:10.1364/OL.528340

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

Journal Article · Tue Jun 25 00:00:00 EDT 2024 · Optics Letters

DOI:https://doi.org/10.1364/OL.528340· OSTI ID:2427055

; Tian, Fanglin; Zhou, Junxiao; Wagner, Jackson C.; Xiong, Wei;

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 ⁽²⁾ reaches 2840 pm/V at 1440 nm, while the Kerr coefficient n ₂ arrives at 2.8 × 10 ⁻¹⁰ cm ² /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.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0022134

OSTI ID:: 2427055

Alternate ID(s):: OSTI ID: 2580199

Journal Information:: Optics Letters, Journal Name: Optics Letters Journal Issue: 13 Vol. 49; ISSN 0146-9592; ISSN OPLEDP

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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