Generation of super-resolved optical needle and multifocal array using graphene oxide metalenses

Wang, Hongtao; Hao, Chenglong; Lin, Han; Wang, Yongtian; Lan, Tian; Qiu, Cheng‐Wei; Jia, Baohua

doi:10.29026/oea.2021.200031

Cited by 54 publications

(31 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fabrication: A 1-μm-thick graphene oxide (GO) film fabricated by the vacuum filtration method [17][18][19] using aqueous GO solution is attached to a cover glass substrate. The aqueous GO dispersion was synthesized by chemical oxidization of graphite via the modified Hummers method.…”

Section: Methodsmentioning

confidence: 99%

Broadband angular momentum cascade via a multifocal graphene vortex generator

et al. 2022

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Broadband angular momentum cascade via a multifocal graphene vortex generator

et al. 2022

Self Cite

View full text Add to dashboard Cite

“…To introduce strong laser-h-BN film interaction, femtosecond laser pulses (20×10 3 μJ/cm 2 ) at λ=800 nm with a low repetition rate (1 kHz) were focused using an objective lens with NA=0.8 28,29 . Due to the massive localized energy in the focal region, the h-BN material was significantly modified.…”

Section: Preparation Of H-bn Films and Flexible Laser Patterningmentioning

confidence: 99%

Giant and light modifiable third-order optical nonlinearity in a free-standing h-BN film

Ren¹,

Lin²,

Zheng³

et al. 2022

OES

Self Cite

View full text Add to dashboard Cite

Recently, hexagonal boron nitride (h-BN) has become a promising nanophotonic platform for on-chip information devices due to the practicability in generating optically stable, ultra-bright quantum emitters. For an integrated information-processing chip, high optical nonlinearity is indispensable for various fundamental functionalities, such as all-optical modulation, high order harmonic generation, optical switching and so on. Here we study the third-order optical nonlinearity of free-standing h-BN thin films, which is an ideal platform for on-chip integration and device formation without the need of transfer. The films were synthesized by a solution-based method with abundant functional groups enabling high third-order optical nonlinearity. Unlike the highly inert pristine h-BN films synthesized by conventional methods, the free-standing h-BN films could be locally oxidized upon tailored femtosecond laser irradiation, which further enhances the third-order nonlinearity, especially the nonlinear refraction index, by more than 20 times. The combination of the free-standing h-BN films with laser activation and patterning capability establishes a new promising platform for high performance onchip photonic devices with modifiable optical performance.

show abstract

“…Realizing multi-target light fields by a single simple optical system is a long-sought mission. In this regard, numerous remarkable attempts have been made, including two beams coupling [21][22]23 , amplitude/phase/polarization coding [24][25]26 , time-dependent wavefront shaping 27,28 , and reconfigurable metasurfaces [29][30][31][32][33] . Among these approaches, although the former two strategies empower the customization of a few target light fields, they require cumbersome optical systems and complex wavefront filters.…”

Section: Introductionmentioning

confidence: 99%