The second-order process underpins many important nonlinear optical applications in the field of classical and quantum optics. Generally, the process manifests itself only in a non-centrosymmetric dielectric medium via an anharmonic electron oscillation when driven by an intense optical field. Due to inversion symmetry, group-IV semiconductors, such as silicon (Si) and germanium (Ge), are traditionally not considered as ideal candidates for second-order nonlinear optics applications. Here, we report the experimental observation of the second-harmonic generation (SHG) in a Ge-on-insulator (GOI) sample under femtosecond optical pumping. We especially, report the measurement of the SHG signal from a GOI sample in the telecom S-band by pumping at nm.
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13 June 2022
Research Article|
June 15 2022
Second-harmonic generation in germanium-on-insulator from visible to telecom wavelengths
Yadong Wang;
Yadong Wang
School of Electrical and Electronic Engineering, Nanyang Technological University
, 50 Nanyang Avenue, Singapore 639798, Singapore
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Daniel Burt
;
Daniel Burt
(Conceptualization, Data curation, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing)
School of Electrical and Electronic Engineering, Nanyang Technological University
, 50 Nanyang Avenue, Singapore 639798, Singapore
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Kunze Lu
;
Kunze Lu
(Methodology)
School of Electrical and Electronic Engineering, Nanyang Technological University
, 50 Nanyang Avenue, Singapore 639798, Singapore
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Donguk Nam
Donguk Nam
a)
(Supervision)
School of Electrical and Electronic Engineering, Nanyang Technological University
, 50 Nanyang Avenue, Singapore 639798, Singapore
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 120, 242105 (2022)
Article history
Received:
April 12 2022
Accepted:
June 03 2022
Citation
Yadong Wang, Daniel Burt, Kunze Lu, Donguk Nam; Second-harmonic generation in germanium-on-insulator from visible to telecom wavelengths. Appl. Phys. Lett. 13 June 2022; 120 (24): 242105. https://doi.org/10.1063/5.0095666
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