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Yuan, Qingchen; Fang, Liang; Zhao, Jianlin; Wang, Yadong; Mao, Bo; Khayrudinov, Vladislav; Lipsanen, Harri; Sun, Zhipei; Zhao, Jianlin

doi:10.3788/col201917.062301

Cited by 5 publications

(5 citation statements)

References 20 publications

(26 reference statements)

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“…The obtained results are in good agreement with the single-shot LIDT values reported in Ref. [38] for HfO 2 (1.55 J/cm 2 ) and within the threshold limit found on ZrO 2 films (1.25 J/cm 2 ) [39] . Otherwise, the LIDT value can differ considerably (i.e., from 0.5 [40] to 22 J/cm 2 [38] ) when considering the multi-parameter dependence on the properties of the film and those of the laser [38,41,42] .…”

Section: Resultssupporting

confidence: 91%

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Bleotu,

Udrea,

Dumitru

et al. 2023

High Pow Laser Sci Eng

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With ultrafast laser systems reaching presently 10 PW peak power or operating at high repetition rates, research towards ensuring the long-term, trouble-free performance of all laser-exposed optical components is critical. Our work is focused on providing insight into the optical material behavior at fluences below the standardized laser-induced damage threshold (LIDT) value by implementing a simultaneous dual analysis of surface emitted particles using a Langmuir probe (LP) and the target current (TC). HfO 2 and ZrO 2 thin films deposited on fused silica substrates by pulsed laser deposition at various O 2 pressures for defect and stoichiometry control were irradiated by Gaussian, ultrashort laser pulses (800 nm, 10 Hz, 70 fs) in a wide range of fluences. Both TC and LP collected signals were in good agreement with the existing theoretical description of laser-matter interaction at an ultrashort time scale. Our approach for an in situ LIDT monitoring system provides measurable signals for below-threshold irradiation conditions that indicate the endurance limit of the optical surfaces in the single-shot energy scanning mode. The LIDT value extracted from the LP-TC system is in line with the multipulse statistical analysis done with ISO 21254-2:2011(E). The implementation of the LP and TC as on-shot diagnostic tools for optical components will have a significant impact on the reliability of next-generation ultrafast and high-power laser systems.

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Section: Resultssupporting

confidence: 91%

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Bleotu,

Udrea,

Dumitru

et al. 2023

High Pow Laser Sci Eng

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“…In this fabricated sample, the NW is not perfectly aligned at the center of the PPC waveguide. As discussed in our previous work [23], which studied the mode coupling between an NW and a PPC nanocavity, both the Q factors and the resonant wavelengths of the resonant modes are expected to be changed as the NW is gradually moved away from the center of the PPC waveguide. These variations could be attributed to the modified coupling strengths between the NW and the optical mode, which is determined by the mode distributions of the PPC waveguide.…”

Section: Hybrid Structure Of the Nw And Ppc Waveguidementioning

confidence: 96%

“…In future work, the optimized location of the NW on the PPC waveguide for maximum Q factor and specific resonant wavelength could be studied by moving the NW carefully, as demonstrated in Ref. [23].…”

Section: Hybrid Structure Of the Nw And Ppc Waveguidementioning

confidence: 99%

“…Leveraging their unique photonic structures, lightmatter interactions and light wave propagations in PPC waveguides or cavities could be controlled effectively in a spatial scale of subwavelength, which is comparable to the thickness of NWs. Recently, a number of works have reported on the integration of NWs with PPC waveguides and nanocavities, which realize significantly enhanced light-NW couplings [18,[20][21][22][23]. For instance, Notomi et al demonstrated the first NW laser at the telecom band by integrating an InP NW into a groove trench of a silicon PPC waveguide, which induced a high-quality (Q) resonant mode [24].…”

Section: Introductionmentioning

confidence: 99%

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Nanowire-assisted microcavity in a photonic crystal waveguide and the enabled high-efficiency optical frequency conversions

Fang

Yuan

et al. 2020

Photon. Res.

Self Cite

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We report an indium phosphide nanowire (NW)-induced cavity in a silicon planar photonic crystal (PPC) waveguide to improve the light-NW coupling. The integration of NW shifts the transmission band of the PPC waveguide into the mode gap of the bare waveguide, which gives rise to a microcavity located on the NW section. Resonant modes with Q factors exceeding 10 3 are obtained. Leveraging on the high density of the electric field in the microcavity, the light-NW interaction is enhanced strongly for efficient nonlinear frequency conversion. Second-harmonic generation and sum-frequency generation in the NW are realized with a continuous-wave pump laser in a power level of tens of microwatts, showing a cavity-enhancement factor of 112. The hybrid integration structure of NW-PPC waveguide and the self-formed microcavity not only opens a simple strategy to effectively enhance light-NW interactions, but also provides a compact platform to construct NW-based on-chip active devices.

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“…It could be attributed to the angle dependence of the coupling efficiency between the SRR mode and PPC cavity mode. In general, the couple efficiency ηφ can be calculated by [26] ηφ =…”

Section: Manipulating Far Field Of Ppc Cavity Mode By the Integrated Srrmentioning

confidence: 99%

Cylindrical vector beam generator on photonic crystal cavity integrated with metal split ring nanoresonators

Xie

Fang

et al. 2023

中国光学快报

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We propose a chip-integratable cylindrical vector (CV) beam generator by integrating six plasmonic split ring resonators (SRRs) on a planar photonic crystal (PPC) cavity. The employed PPC cavity is formed by cutting six adjacent air holes in the PPC center, which could generate a CV beam with azimuthally symmetric polarizations. By further integrating six SRRs on the structure defects of the PPC cavity, the polarizations of the CV beam could be tailored by controlling the opening angles of the SRRs, e.g., from azimuthal to radial symmetry. The mechanism is governed by the coupling between the resonance modes in SRRs and PPC cavity, which modifies the far-field radiation of the resonance mode of the PPC cavity with the SRR as the nano-antenna. The integration of SRRs also increases the coupling of the generated CV beam with the free-space optics, such as an objective lens, promising its further applications in optical communication, optical tweezer, imaging, etc.

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Untitled

Cited by 5 publications

References 20 publications

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Nanowire-assisted microcavity in a photonic crystal waveguide and the enabled high-efficiency optical frequency conversions

Cylindrical vector beam generator on photonic crystal cavity integrated with metal split ring nanoresonators

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