A5090103483- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Metamaterials and Metasurfaces Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Magnetic and transport properties of perovskites and related materials
- ZnO doping and properties
- Advanced Antenna and Metasurface Technologies
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Resonator Technologies
- Photorefractive and Nonlinear Optics
- Advanced Condensed Matter Physics
- Copper-based nanomaterials and applications
- Advanced Fiber Laser Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Advanced Materials and Mechanics
- nanoparticles nucleation surface interactions
- Characterization and Applications of Magnetic Nanoparticles
- Nanocluster Synthesis and Applications
- Surface Roughness and Optical Measurements
- Photonic and Optical Devices
Purdue University West Lafayette
2019-2024
Sandia National Laboratories
2023
Hyperbolic metamaterials demonstrate exotic optical properties that are poised to find applications in subdiffraction imaging and hyperlenses. Key challenges remain for practical applications, such as high energy losses lack of hyperbolic shorter wavelengths. In this work, a new oxide-metal (ZnO-Au) hybrid-material system the vertically aligned nanocomposite thin-film form has been demonstrated with very promising in-plane two-phase ordering using one-step growth method. Au nanopillars grow...
Hybrid plasmonic metamaterials offer a pathway to exotic properties and technologically important applications including subdiffraction imaging energy harvesting. Challenges remain for practical high absorption losses of noble metals tedious growth/fabrication processes. In this work, self-assembled hybrid metamaterial consisting anisotropic AgxAu1-x alloy nanopillars embedded in ZnO matrix has been successfully grown. The chemical composition the nanoalloy was determined be Ag61Au39....
Nanoelectronic devices integrated with functional complex oxides have drawn much attention in recent years. However, due to material and processing compatibility issues, integrating Si-based is challenging, success has been limited. As an example, the Bi3Fe2Mn2Ox (BFMO) supercell system, a single-phase layered oxide made by compositing BiFeO3 BiMnO3, studied for of past decade its unusual Aurivillius structure magnetic ferroelectric properties. most BFMO thin film growth demonstrated on...
Metamaterials present great potential in the applications of solar cells and nanophotonics, such as super lenses other meta devices, owing to their superior optical properties.
Epitaxial lithium niobate (LNO) thin films are an attractive material for devices across a broad range of fields, including optics, acoustics, and electronics. These applications demand high‐quality without in‐plane growth domains to reduce the optical/acoustical losses optimize efficiency. Twin‐free single‐domain‐like has been achieved previously, but it requires specific conditions that might be hard replicate. In this work, versatile nanocomposite‐seeded approach is demonstrated as...
ZnO-Au nanocomposite thin films have been previously reported as hybrid metamaterials with unique optical properties such plasmonic resonance and hyperbolic behaviors. In this study, Au composition in the nanocomposites has effectively tuned by target variation thus resulted microstructure property tuning. Specifically, all grown through pulsed laser deposition (PLD) method show obvious vertically aligned (VAN) structure nanopillars embedded ZnO matrix. Moreover, average diameter of...
Nanocomposite thin film materials present great opportunities in coupling and functionalities unique nanostructures including nanoparticles-in-matrix, vertically aligned nanocomposites (VANs), nanolayers. Interestingly the processed through a non-equilibrium processing method, e.g., pulsed laser deposition (PLD), often possess metastable phases microstructures that could not achieve using equilibrium techniques, thus lead to novel physical properties. In this work, three-phase system...
Abstract To investigate the role of interlayers on growth, microstructure, and physical properties 3D nanocomposite frameworks, a set novel vertically aligned (VAN) frameworks are assembled by relatively thin interlayer (M) sandwiched two consecutively grown La 0.7 Sr 0.3 MnO 3 (LSMO)‐ZnO VANs layers. ZnO nanopillars from VAN layers create heterogeneous frame embedded in LSMO matrix. The includes yttria‐stabilized zirconia (YSZ), CeO 2 , SrTiO BaTiO MgO with in‐plane matching distances...
ZnO–Ag<sub>x</sub>Au<sub>1−x</sub> oxide–nanoalloy vertically aligned nanocomposite thin films have been grown <italic>via</italic> pulsed laser deposition and the film morphology optical properties were tuned through oxygen partial pressure.
Hyperbolic metamaterials are a class of materials exhibiting anisotropic dielectric function owing to the morphology nanostructures. In these structures, one direction behaves as metal, and orthogonal material. Applications include subdiffraction imaging hyperlenses. However, key limiting factors energy losses noble metals challenging fabrication methods. this work, self-assembled plasmonic consisting nanoalloy pillars embedded into ZnO matrix developed using seed-layer approach. Alloys...
Epitaxial single-domain LiNbO 3 thin-films are realized using a novel nanocomposite seeding method. Full microstructure characterization and optical property measurement is conducted as first step to demonstrate viability of this material for integrated photonics applications.
Magnetoacoustic waves generated in piezoelectric and ferromagnetic coupled nanocomposite films through magnetically driven surface acoustic present great promise of loss-less data transmission. In this work, metals Ni, Co
Radio frequency (RF) magnetic devices are key components in RF front ends. However, they difficult to miniaturize and remain the bulkiest systems. Acoustically driven ferromagnetic resonance (ADFMR) offers a route towards miniaturization of devices. The ADFMR literature thus far has focused predominantly on dynamics coupling process, with relatively little work done device optimization. In this work, we present an optimized 2 GHz utilizing relaxed SPUDT transducers lithium tantalate. We...