Optics & Laser Technology, Journal Year: 2024, Volume and Issue: 175, P. 110779 - 110779
Published: Feb. 28, 2024
Language: Английский
Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(2), P. 222 - 233
Published: Jan. 3, 2024
ConspectusSelf-assembly, a spontaneous process that organizes disordered constituents into ordered structures, has revolutionized our fundamental understanding of living matter, nanotechnology, and molecular science. From the perspective nanomaterials, self-assembly serves as bottom-up method for creating long-range-ordered materials. This is accomplished by tailoring geometry, chemistry, interactions components, thereby facilitating efficient fabrication high-quality materials high-performance functional devices. Over past few decades, we have seen controllable organization diverse phases in self-assembled materials, such organic crystals, biomolecular colloidal nanoparticle supercrystals. However, most their assembly mechanisms are derived from liquid bulk medium, where effects boundaries interfaces negligible. In context nanostructure patterning, occurs confined spaces, with feature sizes ranging to hundreds nanometers. settings, ubiquitous can trap system kinetically favored but metastable state, devoid long-range order. makes it extremely difficult achieve structures micro/nano-patterning techniques rely on sessile microdroplets, inkjet printing, dip-pen lithography, contact printing.In stark contrast droplets, capillary bridges─formed liquids between two solid surfaces─provide unique opportunities crystalline under spatial confinement. Because bridges stabilized Laplace pressure, which inversely proportional size, confinement manipulation solutions or suspensions at nanoscale become accessible through rational design surface chemistry geometry. Although global thermodynamic equilibrium unattainable evaporative systems, nucleation packing constituent components be locally realized line bridges. enables unprecedented micro/nanostructures deterministic patterns.In this Account, review advancements First, briefly introduce characterized strong intramolecular relatively weak intermolecular forces, analyzing both challenges inherent nanomaterials. Next, delve construction liquids, focusing especially controlled engineered geometry regulate pressure. Through approach, achieved thicknesses order nanometers wafer-scale homogeneity, structures. Supported factors local free-volume entropy, electrostatic interactions, curvilinear directional microfluidics, nanoconfinement, long-range-ordered, patterning semiconductors, metal-halide perovskites, nanocrystal superlattices using capillary-bridge platform. These microstructures serve bridge nanomaterials integrated devices, enabling emergent functionalities like intrinsic stretchability, giant photoconductivity, propagating interacting exciton polaritons, spin-valley-locked lasing, otherwise Finally, discuss potential directions practical applications self-assembly.
Language: Английский
Citations
9
Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)
Published: Feb. 5, 2024
Benefitting from narrow beam divergence, photonic crystal surface-emitting lasers are expected to play an essential role in the ever-growing fields of optical communication and light detection ranging. Lasers operating with 1.55 μm wavelengths have attracted particular attention due their minimum fiber loss high eye-safe threshold. However, interband absorption significantly decreases performance at this wavelength. Therefore, stronger feedback is needed reduce threshold thus improve output power. Toward goal, photonic-crystal resonators deep holes dielectric contrast often used. Nevertheless, relevant techniques for high-contrast crystals inevitably complicate fabrication final yield. In paper, we demonstrate first continuous-wave operation by using a 'triple-lattice resonator', which superimposes three lattice point groups increase strength in-plane feedback. Using geometry, 180° coupling can be enhanced threefold compared normal single-lattice structure. Detailed theoretical experimental investigations much lower current density structure 'single-lattice' 'double-lattice' resonators, verifying our design principles. Our findings provide new strategy laser miniaturization, crucial realizing use future high-speed applications.
Language: Английский
Citations
9
Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)
Published: Feb. 20, 2024
Abstract Harnessing optical supermode interaction to construct artificial photonic molecules has uncovered a series of fundamental phenomena analogous atomic physics. Previously, the distinct energy levels and interactions in such two-level systems were provided by coupled microresonators. The reconfigurability is limited, as they often require delicate external field stimuli or mechanically altering geometric factors. These highly specific approaches also limit potential applications. Here, we propose versatile on-chip molecule multimode microring, utilizing flexible regulation methodology dynamically control existence strength spatial modes. transition between single/multi-mode states enables “switched-off/on” functionality molecule, supporting wider generalized applications scenarios. In particular, “switched-on” state shows multidimensional mode splitting aspects both coupling phase difference, equivalent a.c. d.c. Stark effect. “Switched-off” allows for perfect low-loss single-mode (Q i ~ 10 million) under an ultra-compact bend size (FSR 115 GHz) foundry-based silicon microring. It breaks stereotyped image FSR-Q factor trade-off, enabling ultra-wideband high-resolution millimeter-wave operations. Our demonstration provides portable solution integrated system, extending its research scope from physics real-world nonlinear signal processing sixth-generation wireless communication.
Language: Английский
Citations
9
Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 9, 2025
Abstract This work presents an exploratory study of the potential applications electrically biased materials that possess a nonreciprocal and non‐Hermitian electromagnetic response analogous to electronic field‐effect transistors. The most distinctive feature such is their chiral‐gain, meaning can be active or dissipative depending on handedness wave polarization. It shown how chiral‐gain harnessed develop novel devices with unique properties as chiral lasers, polarization‐dependent mirrors, coherent‐perfect‐absorber lasers. Furthermore, it demonstrated bypass reciprocity constraint typically limits external coupling strength, thus facilitating excitation cavities extremely large quality factors.
Language: Английский
Citations
1
Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
Enhancing photoluminescence (PL) efficiency in colloidal quantum dots is pivotal for next-generation near-infrared photodetectors, imaging systems, and photonic devices. Conventional methods, especially metal-based plasmonic structures, suffer from large optical losses, which limits their practical use. Here, we introduce a quasi-bound state the continuum (quasi-BIC) metasurface on silicon-on-insulator platform, tailored to provide high-quality factor resonances with minimized losses. Utilizing topological charge engineering controlled in-plane asymmetry silicon cylinder arrays, developed robust quasi-BIC capable of maintaining high Q across broad angular range, achieving an experimental 3031 at normal incidence. This approach significantly enhances near-field interactions, ≤110-fold increase PL PbS 33 K 41-fold enhancement room temperature. Our findings offer scalable, cost-effective solution enhancing light emission advanced optoelectronic applications.
Language: Английский
Citations
1
Nature Photonics, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
Language: Английский
Citations
1
Optica, Journal Year: 2023, Volume and Issue: 10(12), P. 1709 - 1709
Published: Nov. 6, 2023
On-chip photonic neural networks (PNN) are emerging as an attractive solution for artificial due to their high computing density, low energy consumption, and compact size. Matrix-vector multiplication (MVM) plays a key role in on-chip PNN, can achieve high-speed multiply-accumulate operation. Most current schemes implement MVM by adopting wavelength division multiplexing technology accumulate the power of different wavelengths together. This requires multiple laser sources. Additionally, both positive negative domain inevitable realizing precise PNNs, but because innate limitations light, effective solutions perform value still inadequate. Here, we propose demonstrate PNN accelerator based on mode reduce use multi-wavelength lasers. We show that it satisfactorily tackle real-number-field (including domains) novel, our knowledge, transformation mapping approach. As proof-of-concept, fabricated image convolution letter pattern detection, achieving density 1.37TOPS/mm 2 under 22.38 Gbaud modulation rate.
Language: Английский
Citations
22
Small Science, Journal Year: 2024, Volume and Issue: 4(4)
Published: Feb. 14, 2024
A van der Waals (vdW) heterostructure is formed by combining multiple materials through vdW bonds. It can combine the advantages of electronic, optical, thermal, and magnetic properties different 2D has potential to develop into next generation high-performance functional devices. Herein, current research advances heterostructures are reviewed. First, fabrication methods physical structures summarized. The 2D/nD (n = 0,1,2,3) mixed-dimensional discussed in detail. Second, a new type introduced based on two-dimensional electron gas with nanoscale junction interface. Finally, application prospects photoelectric memory devices further outlined combing applications neural networks. This review shows that have great high integration, energy harvesting, logical operations, it provides directions suggestions for future environmentally friendly, high-performance, smart
Language: Английский
Citations
8
Nanophotonics, Journal Year: 2024, Volume and Issue: 13(12), P. 2051 - 2073
Published: Feb. 17, 2024
Optical signal processing has been playing a crucial part as powerful engine for various information systems in the practical applications. In particular, achieving large-scale programmable chips are highly desirable high flexibility, low cost and processing. Silicon photonics, which developed successfully past decade, provides promising option due to its unique advantages. Here, recent progress of silicon photonic chip microwave optical communications, computing, quantum photonics well dispersion controlling reviewed. Particularly, we give discussion about realization high-performance building-blocks, including ultra-low-loss waveguides, 2 × Mach-Zehnder switches microring resonator switches. The methods configuring also discussed. representative examples summarized applications beam steering, switching, controlling. Finally, an outlook challenges further developing chips.
Language: Английский
Citations
7
Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)
Published: April 8, 2024
Abstract The analysis of optical spectra—emission or absorption—has been arguably the most powerful approach for discovering and understanding matter. invention development many kinds spectrometers have equipped us with versatile yet ultra-sensitive diagnostic tools trace gas detection, isotope analysis, resolving hyperfine structures atoms molecules. With proliferating data information, urgent demanding requirements placed today on spectrum ever-increasing spectral bandwidth frequency resolution. These are especially stringent broadband laser sources that carry massive information dispersive devices used in processing systems. In addition, analyzers expected to probe device’s phase response where extra is encoded. Here we demonstrate a novel vector analyzer (VSA) capable characterizing passive active one setup. Such dual-mode VSA can measure loss, response, dispersion properties devices. It also coherently map into RF domain. features 55.1 THz (1260–1640 nm), resolution 471 kHz, dynamic range 56 dB. Meanwhile, our fiber-based compact robust. requires neither high-speed modulators photodetectors nor any feedback control. Finally, employ applications including characterization integrated waveguides, mapping comb spectra, coherent light detection ranging (LiDAR). Our presents an innovative device spectroscopy, play critical role future photonic systems sensing, communication, imaging, quantum processing.
Language: Английский
Citations
7