229 citations · 283 across the 10 of their papers we have counts for
10 papers
Enhanced Patterned Fluorescence from Polystyrene through Focused Electron Beam Irradiation under Various Gases
Deepak Kumar, Joseph W. Brill, J. Todd Hastings
We report on a novel method for tuning and enhancing fluorescence from irradiated polystyrene through electron-beam exposure in gaseous environments. We describe the effect of elec…
A Silicon Nitride Microring Modulator for High-Performance Photonic Integrated Circuits
Venkata Sai Praneeth Karempudi, Ishan G Thakkar, Jeffrey Todd Hastings
The use of the Silicon-on-Insulator (SOI) platform has been prominent for realizing CMOS-compatible, high-performance photonic integrated circuits (PICs). But in recent years, the…
A Polymorphic Electro-Optic Logic Gate for High-Speed Reconfigurable Computing Circuits
Venkata Sai Praneeth Karempudi, Sairam Sri Vatsavai, Ishan Thakkar +1
In the wake of dwindling Moore's law, integrated electro-optic (E-O) computing circuits have shown revolutionary potential to provide progressively faster and more efficient hardwa…
A Silicon Nitride Microring Based High-Speed, Tuning-Efficient, Electro-Refractive Modulator
Venkata Sai Praneeth Karempudi, Ishan G Thakkar, Jeffrey Todd Hastings
The use of the Silicon-on-Insulator (SOI) platform has been prominent for realizing CMOS-compatible, high-performance photonic integrated circuits (PICs). But in recent years, the…
Antiferromagnetic real-space configuration probed by dichroism in scattered x-ray beams with orbital angular momentum
Margaret R. McCarter, Ahmad I. U. Saleheen, Arnab Singh +8
X-ray beams with orbital angular momentum (OAM) are a promising tool for x-ray characterization techniques. Beams with OAM have a helicity--an azimuthally varying phase--which lead…
Angular-Dependent Dynamic Response and Magnetization Reversal in Fibonacci-Distorted, Kagome Artificial Spin Ice
Ali Frotanpour, Justin Woods, Barry Farmer +2
We have measured the angular dependence of ferromagnetic resonance (FMR) spectra for Fibonacci-distorted, Kagome artificial spin ice (ASI). The number of strong modes in the FMR sp…
Limiting Regimes for Electron-Beam Induced Deposition of Copper from Aqueous Solutions Containing Surfactants
Samaneh Esfandiarpour, J. Todd Hastings
Focused electron beam induced deposition of pure materials from aqueous solutions has been of interest in recent years. However, controlling the liquid film in partial vacuum is ch…
Switchable X-ray Orbital Angular Momentum from an Artificial Spin Ice
Justin Woods, Xiaoqian M Chen, Rajesh V. Chopdekar +12
Artificial spin ices (ASI) have been widely investigated as magnetic metamaterials with exotic properties governed by their geometries. In parallel, interest in X-ray photon orbita…
Hybrid Metasurfaces for Simultaneous Focusing and Filtering
Mansoor A. Sultan, Fatih Balli, Daniel L. Lau +1
This work presents the design and fabrication of simple, polymeric, structure-based optical filters that simultaneously focus light. These filters represent a novel design at the b…
A Hybrid Achromatic Metalens
Fatih Balli, Mansoor A. Sultan, Sarah K. Lami +1
Metamaterials and metasurfaces are widely used to manipulate electromagnetic waves over a broad range of wavelengths. Several recent efforts have focused on metalenses, ultra-thin…