Second harmonic generation efficiency affected by radiation force of a high-energy laser beam through stress within a mounted potassium dihydrogen phosphate crystal

Su, Ruifeng; Zhu, Mingzhi; Huang, Zhan; Wang, Qingji; Wu, Wenkai

doi:10.1117/1.oe.57.1.015106

Cited by 3 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nonlinear optics is one of the cornerstones of modern photonics which founded a broad range of applications in laser technology, optical microscopy, and quantum optics. Particularly, second harmonic generation (SHG) corresponds to the nonlinear process that converts two identical photons into one photon with doubled frequency. , As a widely observed second order nonlinear effect, SHG has been extensively applied in optical spectroscopy, signal processing, and image processing. − Conventional SHG devices generally rely on bulk nonlinear crystals including lithium niobate (LiNbO 3 ), beta barium borate (BBO), and potassium dihydrogen phosphate (KDP), − requiring phase-matching condition and long interaction length with light.…”

Section: Introductionmentioning

confidence: 99%

Giant Enhancement of Continuous Wave Second Harmonic Generation from Few-Layer GaSe Coupled to High-Q Quasi Bound States in the Continuum

et al. 2021

View full text Add to dashboard Cite

Two-dimensional (2D) layered materials such as GaSe recently have emerged as novel nonlinear optical materials with exceptional properties. Although exhibiting large nonlinear susceptibilities, the nonlinear responses of 2D materials are generally limited by the short interaction lengths with light, thus further enhancement via resonant photonic nanostructures is highly desired for building high-efficiency nonlinear devices. Here, we demonstrate a giant second-harmonic generation (SHG) enhancement by coupling 2D GaSe flakes to silicon metasurfaces supporting quasi-bound states in the continuum (quasi-BICs) under continuous-wave (CW) operation. Taking advantage of both high-quality factors and large mode areas of quasi-BICs, SHG from a GaSe flake is uniformly enhanced by nearly 4 orders of magnitude, which is promising for high-power coherent light sources. Our work provides an effective approach for enhancing nonlinear optical processes in 2D materials within the framework of silicon photonics, which also brings second-order nonlinearity associated with 2D materials to silicon photonic devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Giant Enhancement of Continuous Wave Second Harmonic Generation from Few-Layer GaSe Coupled to High-Q Quasi Bound States in the Continuum

et al. 2021

View full text Add to dashboard Cite

show abstract

Effect of external stresses on the optical and electronic properties of potassium dihydrogen phosphate crystals

Mylvaganam

Zhang

2019

Mater. Res. Express

View full text Add to dashboard Cite

Ultraviolet second harmonic generation from Mie-resonant lithium niobate nanospheres

et al. 2021

View full text Add to dashboard Cite

Lithium niobate (LN), as a nonlinear material with a large nonlinear susceptibility, has been widely employed in second harmonic generation (SHG) up to ultraviolet (UV) frequency range due to its broad low-absorption window. In nanophotonics, it is possible to harness the Mie resonances associated with the single dielectric particles to boost the nonlinear light–matter interactions. Here, we fabricate single Mie-resonant LN nanospheres on a SiO2 substrate via the femtosecond (fs) laser ablation technique. By exploiting the magnetic dipole (MD) Mie resonance, UV SHG from the LN nanosphere is significantly enhanced with a measured conversion efficiency of 4.45 × 10−8 under the excitation of an fs laser at 750 nm. The single LN nanospheres achieved in this work could serve as Mie resonators for building nonlinear nanophotonic devices such as frequency converters and quantum light sources, etc.

show abstract

Second harmonic generation efficiency affected by radiation force of a high-energy laser beam through stress within a mounted potassium dihydrogen phosphate crystal

Cited by 3 publications

References 22 publications

Giant Enhancement of Continuous Wave Second Harmonic Generation from Few-Layer GaSe Coupled to High-Q Quasi Bound States in the Continuum

Giant Enhancement of Continuous Wave Second Harmonic Generation from Few-Layer GaSe Coupled to High-Q Quasi Bound States in the Continuum

Effect of external stresses on the optical and electronic properties of potassium dihydrogen phosphate crystals

Ultraviolet second harmonic generation from Mie-resonant lithium niobate nanospheres

Contact Info

Product

Resources

About