2022 IEEE Photonics Conference (IPC), Год журнала: 2023, Номер unknown, С. 1 - 2
Опубликована: Ноя. 12, 2023
We demonstrate nanofabrication of eutectic gallium-indium (EGaIn) liquid metal (LM) nanostructures using a facile and reliable method based on selective wetting between gold EGaIn LM. Nanostructures with critical feature sizes down to ~500 nm are achieved, which show optical responses in the near-infrared region.
Язык: Английский
Nano Letters, Год журнала: 2023, Номер 23(15), С. 7150 - 7156
Опубликована: Июль 21, 2023
Alkali metals have low optical losses in the visible to near-infrared (NIR) compared with noble metals. However, their high reactivity prohibits exploration of properties. Recently sodium (Na) has been experimentally demonstrated as a low-loss plasmonic material. Here we report on thermo-assisted nanoscale embossing (TANE) technique for fabricating nanostructures from pure potassium (K) and NaK liquid alloys. We show high-quality-factor resonances K narrow 15 nm NIR, which attribute material quality loss. further demonstrate Na–K plasmonics by exploiting eutectic phase diagram. Our study expands library alkali metal plasmonics, potentially enabling range new platforms active metamaterials photonic devices.
Язык: Английский
Процитировано
14
Advanced Optical Materials, Год журнала: 2023, Номер 11(22)
Опубликована: Окт. 3, 2023
Abstract Originating from the intrinsic metallic and liquid natures, gallium‐based metals (Ga‐based LMs) have been greatly developed in research of soft electronics, chemical synthesis, other fields due to their fascinating characteristics. Meanwhile, development application metal optics can help modern medicine industry reach rapid developmental stages, such as disease imaging, photothermal treatment, sensor detection. However, Ga‐based LMs much less explored terms optical properties, particularly alloys, few reviews contributed photonic applications. achieve wideband‐tunable plasmonic resonance exhibit characteristic responses owing unique polymorphisms, undercooling, superior mobility. broad applications switches memory, sensors, light sources, light‐driven micro or nano‐robots, photoacoustic controllable metamaterials. In this study, recent progress properties potential are summarized. Current challenges future perspectives field summarized discussed.
Язык: Английский
Процитировано
12
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Март 25, 2025
Colloidal chemistry is a well-known synthetic platform for producing size-uniform nanoparticles. However, the optimization of each material system still relies on tedious trial-and-error approach in multiparametric space, commonly referred to as design-of-experiments. This process particularly laborious emerging classes which only handful syntheses have been reported. Alternative approaches rational design colloidal nanoparticles involve studying reaction with situ methods, thereby revealing true underlying rules synthesis monodisperse Here, we focus highly promising but little-studied gallium nanoparticles, using synchrotron-based small-angle X-ray scattering suitable monitoring technique. We investigate intertwined effects temperature, concentration reactants, and sterics surface ligands during hot-injection colloids. For quantitative comparison, provide description through timestamps partially overlapping reaction, nucleation, growth stages. Our results reveal key role balancing kinetics nucleation growth, well enabling stability synthesis. Furthermore, demonstrate that large overlap between stages does not preclude formation experiments suggest several possible strategies achieving thus peculiar liquid metal nanodroplets offering insights can be extended other colloids prepared via
Язык: Английский
Процитировано
0
Small Methods, Год журнала: 2024, Номер unknown
Опубликована: Апрель 19, 2024
Surface-enhanced Raman scattering (SERS) sensors typically employ nanophotonic structures that support high-field confinement and enhancement in hotspots to increase the from target molecules by orders of magnitude. In general, high field SERS can be achieved reducing critical dimensions mode volumes nanoscale. To this end, a multitude employing photonic with nanometric have been demonstrated. However, delivering analyte into is challenging, trade-off between confinement/enhancement delivery efficiency limiting factor for performance many sensors. Here, new type sensor solid-metal nanoparticles bulk liquid metal demonstrated form resonators nanoparticle-on-liquid-mirror (NPoLM) architecture, which effectively resolves trade-off. particular, unconventional architecture allows convenient formation introducing after are efficiently delivered surface gold nanoparticles. addition, cost-effective reliable process developed produce on substrate suitable forming NPoLM structures. These achieve two magnitude higher signals than alone.
Язык: Английский
Процитировано
2
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Дек. 8, 2024
Abstract This paper describes laser exposure to tune the infrared (IR) emissivity of a film eutectic gallium indium (EGaIn) particles. EGaIn – liquid metal at room temperature forms native oxide that keeps particles from spontaneously percolating. Photothermal energy CO 2 percolates into conductive network. Here, it also causes decrease in IR 0.4 0.24 over range 7.5–13 µm wavelength (measured by an camera) with increase fluence 1.4 1.9 J cm −2 . The percolate most prominently bottom film, and thus, apparent surface roughness does not change exposure. finding suggests is due changes film's topography. Instead, attributed loss plasmonic resonance effect after sintering, which confirmed optical simulations. As demonstration, shown ability makes possible encrypt messages camouflage laser‐processed patterns.
Язык: Английский
Процитировано
1
AIP Advances, Год журнала: 2024, Номер 14(9)
Опубликована: Сен. 1, 2024
Split-ring resonators (SRRs) and complementary split-ring (CSRRs) are widely used in microwave devices. Considering its advantages of fluidity, high metallic conductivity, extreme deformability, liquid metal is expected to enrich the tunability SRR CSRR. Here, a stretchable resonator based on CSRR, using as conducting layer Ecoflex dielectric layer, prepared by 3D printing. From transmission spectra, we find that resonant frequency can be continuously tuned from 3.77 3.40 GHz stretching resonator, which exhibits stable quality factor, ductility, excellent stretchability, linearity. We then study coupling between magnons yttrium iron garnet film photons CSRRs. The anti-crossing effects observed coefficient spectra changing either strength magnetic field or size g/2π determined 63 MHz at 800 Oe. Our findings could promote development reconfigurable metamaterials cavity optomagnonics.
Язык: Английский
Процитировано
0
Optical Engineering, Год журнала: 2024, Номер 63(03)
Опубликована: Март 7, 2024
We explore the characteristics and laser-damage behavior of gallium-based liquid metal alloy mirrors under exposure to ns laser pulses. One key advantages using is self-healing potential following perturbations arising from high-power In this work, performance metrics, such as reflectivity initiation mechanism threshold, were investigated fused-silica cells filled with three different Ga alloys. The results suggest that irreversible modification (damage) 355-nm, 6-ns pulses are associated formation gallium oxide, taking place at a fluence significantly higher than for damage in conventional mirrors. This believed arise requiring increased absorbed energy an material surface occur. exploratory work first its kind highlights some favorable gallium-alloy
Язык: Английский
Процитировано
0
Optics Communications, Год журнала: 2024, Номер 564, С. 130626 - 130626
Опубликована: Апрель 22, 2024
Язык: Английский
Процитировано
0
Small, Год журнала: 2024, Номер unknown
Опубликована: Сен. 23, 2024
Gallium-based liquid metals (LMs) are widely used for stretchable and reconfigurable electronics thanks to their fluidic nature excellent conductivity. These LMs possess attractive optical properties photonics applications as well. However, due the high surface tension of LMs, it is challenging form LM nanostructures with arbitrary shapes using conventional nanofabrication techniques. As a result, LM-based nanophotonics has not been extensively explored. Here, simple yet effective technique demonstrated deterministically fabricate nanopatterns yield over large area. This demonstrates first time capability nanophotonic structures various precisely defined sizes two different that is, gallium eutectic gallium-indium alloy. High-density arrays critical feature down ≈100 nm inter-pattern spacings achieved, corresponding highest resolution any fabrication developed date. Additionally, demonstrate long-term stability under ambient conditions. work paves way toward further development wide range technologies applications.
Язык: Английский
Процитировано
0
Optics Express, Год журнала: 2024, Номер 32(27), С. 47843 - 47843
Опубликована: Дек. 5, 2024
The high adaptability and flexibility of reconfigurable cavity filters (RCFs) provide a compelling solution for signal modulation in communication systems. However, current reports on these are predominantly concentrated within the frequency range few GHz. As frequencies continue to escalate, there is pressing need that can operate at higher frequencies. This study presents mechanical RCF operating W-band (75-110 GHz) address high-frequency filters. reconfigurability filter enhanced by adjusting height liquid metal posts interchanging different (LM) media, thereby augmenting its tuning flexibility. During experiment, we observed potential dispersion effects LMs near 100 GHz, which were hypothetically validated. Finally, tested performance with single or double LM tubes using vector network analyzer achieve consistency between experimental simulated results. offers unique sub-terahertz systems critical requirements dynamic filtering capabilities.
Язык: Английский
Процитировано
0