Femtosecond mode-locked Nd,La:CaF_2 disordered crystal laser

Wang, Huibo; Zhu, Jiangfeng; Gao, Ziye; Yang, Yu; Liu, Kai; Wang, Junli; Wei, Zhiyi; Liu, Jian; Jiang, Dapeng; Ma, Fengkai; Su, Liangbi

doi:10.1364/ome.6.002184

Cited by 30 publications

(20 citation statements)

References 19 publications

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“…[ 30–33 ] The system also manifests excellent reversibility upon numerous wrinkled/flattened surface switching cycles (Figure 3h). And the corresponding large optical modulation of 72% change in transmittance within 5% strain in this system is also exceptionally outstanding, as compared to those of other reported strain tunable smart windows fabricated based on wrinkles, [ 12,14,16,18,20–22 ] wrinkles combined with other topography, [ 11,15,17 ] ridges, [ 19 ] pillars, [ 13 ] nano‐gaps, [ 23 ] and nano‐voids, [ 10 ] as shown in Figure 3i. Since the fabrication of this system is very facile and the raw materials are commercially available and inexpensive, it shows promise for large scale production.…”

Section: Resultsmentioning

confidence: 63%

“…Inspired by these remarkable natural adaptivities, artificial materials have been developed to exhibit analogous micropatterns based on a film‐substrate hybrid structure, in which the wrinkled surface can be triggered by mechanically, [ 8–23 ] thermally, [ 5,24 ] and solvent [ 4,25 ] induced compressive stress. Among these, the wrinkled morphologies can be generated by various mechanical means, including uniaxial [ 8–11 ] and/or biaxial [ 19,21,26 ] stretching/compressing, bending, [ 27,28 ] indenting, [ 5,29 ] and electrical driven actuation based on dielectric elastomers.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Zeng

Shen

et al. 2021

Adv Funct Materials

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A versatile wrinkle‐based micropatterned system with a film‐substrate structure is proposed, which contains a hydrophilic film of polyvinyl alcohol or its composite with laponite and a hydrophobic substrate of polydimethylsiloxane or its composite with carbon black. The wrinkled system features high design flexibility and multistimuli responsiveness, which can be activated by various mechanical methods, including vertical press or scratch, gentle stretch‐and‐release, bend, or analogous magneto‐mechanical and electro‐mechanical modes. The resultant wrinkles possess 1) instantaneous and reversible strain/moisture/light responsive optical modulation; 2) tunable dynamics for the aforementioned strain/moisture/light response;3) tailorable amplitude/wavelength; 4) unique surface morphologies from the coupling of wrinkles and cracks; 5) excellent reversibility and durability. A variety of applications are demonstrated based on this system, including 1) a moisture erasable highly sensitive pressure responsive device and pattern replicator with a high fidelity; 2) a moisture erasable scratch/magneto‐mechanical re‐writable tablet; 3) an electro‐mechanical controllable smart window with an ultra‐sensitive strain responsive transmittance modulation and a low operating voltage; 4) various types of strain responsive, moisture erasable, and laser writable information recording/encryption devices. This work provides new routes for designing innovative wrinkled systems triggered by diverse mechanical fashions and can decode multiple environmental stimuli into optical signals for widespread application.

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Section: Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Zeng

Shen

et al. 2021

Adv Funct Materials

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“…Earlier, oriented wrinkled surfaces are typically fabricated with prestrained elastic substrates modified by surface treatment, thereby offering a unique foundation for possessing both reversible and responsive behavior. These functional surfaces with controlled amplitude and periodicity have been applied in modifying surface wettability, [ 39,136,148 ] dynamic optical switches, [ 189 ] smart windows, [ 186 ] among others. Similarly, specific solvents may induce the generation of oriented wrinkles, which disappear when the solvent evaporates.…”

Section: Fabricationmentioning

confidence: 99%

Wrinkled Interfaces: Taking Advantage of Anisotropic Wrinkling to Periodically Pattern Polymer Surfaces

et al. 2023

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Periodically patterned surfaces can cause special surface properties and are employed as functional building blocks in many devices, yet remaining challenges in fabrication. Advancements in fabricating structured polymer surfaces for obtaining periodic patterns are accomplished by adopting "top-down" strategies based on self-assembly or physico-chemical growth of atoms, molecules, or particles or "bottom-up" strategies ranging from traditional micromolding (embossing) or micro/nanoimprinting to novel laser-induced periodic surface structure, soft lithography, or direct laser interference patterning among others. Thus, technological advances directly promote higher resolution capabilities. Contrasted with the above techniques requiring highly sophisticated tools, surface instabilities taking advantage of the intrinsic properties of polymers induce surface wrinkling in order to fabricate periodically oriented wrinkled patterns. Such abundant and elaborate patterns are obtained as a result of self-organizing processes that are rather difficult if not impossible to fabricate through conventional patterning techniques. Focusing on oriented wrinkles, this review thoroughly describes the formation mechanisms and fabrication approaches for oriented wrinkles, as well as their fine-tuning in the wavelength, amplitude, and orientation control. Finally, the major applications in which oriented wrinkled interfaces are already in use or may be prospective in the near future are overviewed.

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“…It is worth noting that non-optically active rare earth codopants, such as Y 3+ , La 3+ , Gd 3+ , or Lu 3+ , are often introduced together with Nd 3+ into CaF 2 in order to reduce interactions between Nd 3+ ions and overcome the luminescence quenching in Nd:CaF 2 due to clustering behavior of trivalent dopants in CaF 2 lattice. Efficient sub-picosecond pulsed NIR lasers have been reported using Nd,Y:CaF 2 , − Nd,Lu:CaF 2 , and Nd,La:CaF 2 − single crystals.…”

Section: Introductionmentioning

confidence: 99%

Growth, Characterization, and Efficient Continuous-Wave Laser Operation in Nd,Gd:CaF₂ Single-Crystal Fibers

Zhang

Wang

Feng

et al. 2020

Crystal Growth & Design

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Nd,Gd:CaF 2 single-crystal fibers (SCFs) of various Nd 3+ and Gd 3+ concentrations were grown by a modified temperature gradient technique (TGT) using a home-designed multi-microchannel crucible. Powder and Laue X-ray diffraction measurements indicated the SCFs consist of pure monocrystalline CaF 2 phase. Distributions of rare earth dopants in SCFs are proven to be uniform by both EDS and spectroscopic measurements. Laser diode (LD) pumped continuous-wave (CW) laser output at ∼1.06 μm spectral region of a highest slope efficiency of 42% and a maximum output power of 1.49 W were achieved. Comparison of laser performances between Nd,Gd:CaF 2 SCFs and bulk crystal was analyzed, indicating the potential of fluoride SCFs in high-power laser applications.

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Femtosecond mode-locked Nd,La:CaF_2 disordered crystal laser

Cited by 30 publications

References 19 publications

Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Wrinkled Interfaces: Taking Advantage of Anisotropic Wrinkling to Periodically Pattern Polymer Surfaces

Growth, Characterization, and Efficient Continuous-Wave Laser Operation in Nd,Gd:CaF₂ Single-Crystal Fibers

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Femtosecond mode-locked Nd,La:CaF_2 disordered crystal laser

Cited by 30 publications

References 19 publications

Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Tailoring Multistimuli Responsive Micropatterns Activated by Various Mechanical Modes

Wrinkled Interfaces: Taking Advantage of Anisotropic Wrinkling to Periodically Pattern Polymer Surfaces

Growth, Characterization, and Efficient Continuous-Wave Laser Operation in Nd,Gd:CaF2 Single-Crystal Fibers

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Product

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Growth, Characterization, and Efficient Continuous-Wave Laser Operation in Nd,Gd:CaF₂ Single-Crystal Fibers