Tunable Enhanced Second-Harmonic Generation in InP-InAsP Quantum Well Nanomembranes

Zhicheng Su; Jingshi Yan; Naiyin Wang; Chennupati Jagadish; Dragomir Neshev; Hark Hoe Tan

doi:10.1002/smll.202307512

Tunable Enhanced Second-Harmonic Generation in InP-InAsP Quantum Well Nanomembranes

Small. 2024 Feb 11:e2307512. doi: 10.1002/smll.202307512. Online ahead of print.

Authors

Zhicheng Su^{1

2}, Jingshi Yan^{2

3}, Naiyin Wang^{2

3}, Chennupati Jagadish^{2

3}, Dragomir Neshev^{2

3}, Hark Hoe Tan^{2

3}

Affiliations

¹ School of Electronic Science and Engineering, Southeast University, Nanjing, Jiangsu, 210096, China.
² Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT, 2600, Australia.
³ Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT, 2600, Australia.

PMID: 38342669
DOI: 10.1002/smll.202307512

Abstract

Second-harmonic generation (SHG) offers a convenient approach for infrared-to-visible light conversion in tunable nanoscale light sources and optical communication. Semiconductor nanostructures offer rich possibilities to tailor their nonlinear optical properties. In this study, strong second-harmonic generation in InP nanomembranes with InAsP quantum well (QW) is demonstrated. Compared with bulk InP, up to 100 times enhancement of SHG is achieved in the short-wave infrared range. This enhancement is shown to be predominantly induced by the resonance-enhanced absorption and quantum confinement of fundamental wavelengths in the InAsP QW. The thin nanomembrane structure will also provide nanocavity enhancement for second-harmonic wavelengths. The enhanced SHG peak wavelengths can also be tuned by changing the QW composition. These findings provide an effective strategy for enhancing and manipulating the second-harmonic generation in semiconductor quantum-confined nanostructures for on-chip all-optical applications.

Keywords: InAsP QWs; nanomembranes; quantum confinement; resonance absorption; second-harmonic generation.

Abstract

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