DEVCOM Army Research Laboratory

Multiband topological heterojunctions on the surface nanoscale axial photonics platform

Abstract Analogue Hamiltonian simulation (AHS) in photonic systems can be an enticing alternative to direct experimental study of complex Hamiltonian systems, leading to the emergence of the field of topological photonics. In this work, we leverage the ultra-low loss operation an...

Frequency-dependent shear and bulk viscosity of aqueous and non-aqueous lithium battery electrolytes

Transverse ultrasound was used to examine the frequency-dependent shear viscosities of three lithium bis(trifluoromethanesulfonyl)imide-based electrolytes: aqueous, non-aqueous, and hybrid aqueous-organic solutions. Frequency-dependent bulk viscosities of two of the electrolytes...

Sub-Doppler rubidium atom cooling using a programmable agile integrated PZT-on-SiN resonator

Abstract Programmability and precise control of laser frequency are essential for quantum experiments and applications such as atomic clocks, quantum computers, and cold-atom sensors. Current systems use bulky, power-hungry modulators and frequency shifters which are difficult to...

Atomistic framework for glassy polymer viscoelasticity across twenty frequency decades

Glassy polymers are central to engineering applications, yet their viscoelastic response over broad frequency and temperature ranges remains difficult to characterize. We extend non-affine deformation theory by incorporating a time-dependent memory kernel within the generalized L...

Titanium Oxynitrideby TiO2 Nitridation:A Comparative Study of Film, Nanoparticle, and Metasurface NanostructureProperties

Abstract Titanium oxynitride (TiOxNy) is a unique plasmonic material bridging dielectric TiO2 and metallic TiN. In this study, the properties of TiOxNy films, film-derived metasurfaces, and colloidal nanoparticles, all synthesized by the temperature-controlled ammonia nitridation...