40 citations · 107 across the 11 of their papers we have counts for
12 papers
On observation of dispersion in tunable second-order nonlinearities of silicon-rich nitride thin films
Hung-Hsi Lin, Rajat Sharma, Alex Friedman +5
We present experimental results on second-harmonic generation in non-stoichiometric, silicon-rich nitride (SRN) films. The as-deposited film presents a second-order nonlinear coeff…
Integrated and Steerable Vortex Lasers using Bound States in Continuum
B. Bahari, F. Vallini, T. Lepetit +5
Orbital angular momentum is a fundamental degree of freedom of light that manifests itself even at the single photon level. The coherent generation and beaming of structured light…
Electronic Metamaterials with Tunable Second-order Optical Nonlinearities
Hung-Hsi Lin, Felipe Vallini, Mu-Han Yang +6
The ability to engineer metamaterials with tunable nonlinear optical properties is crucial for nonlinear optics. Traditionally, metals have been employed to enhance nonlinear optic…
Dynamic Hysteresis Probes High-β Nanolaser Emission Regimes
Si Hui Pan, Qing Gu, Abdelkrim El Amili +2
The quest for an integrated light source that promises high energy efficiency and fast modulation for high-performance photonic circuits has led to the development of room-temperat…
Observation of second-harmonic generation in silicon nitride waveguides through bulk nonlinearities
Matthew W. Puckett, Rajat Sharma, Hung-Hsi Lin +3
We present experimental results on the observation of a bulk second-order nonlinear susceptibility derived from both free-space and integrated measurements in silicon nitride. Phas…
Capacitively-Induced Free-Carrier Effects in Nanoscale Silicon Waveguides for Electro-Optic Modulation
Rajat Sharma, Matthew W. Puckett, Hung-Hsi Lin +3
We fabricate silicon waveguides in silicon-on-insulator (SOI) wafers clad with either silicon dioxide, silicon nitride, or aluminum oxide, and by measuring the electro-optic behavi…
Transmission Enhancement of High- Waves through Metal-InGaAsP Multilayers Calculated via Scattering Matrix Method with Semi-Classical Optical Gain
Joseph S. T. Smalley, Felipe Vallini, Shiva Shahin +2
We analyze the steady-state transmission of high-momentum (high-) electromagnetic waves through metal-semiconductor multilayer systems with loss and gain in the near-infrared (N…
Silicon Nanoridge Array Waveguides for Nonlinear and Sensing Applications
Matthew W. Puckett, Rajat Sharma, Felipe Vallini +6
We fabricate and characterize waveguides composed of closely spaced and longitudinally oriented silicon ridges etched into silicon-on-insulator wafers. Through both guided mode and…
Characterizing the effects of free carriers in fully-etched, dielectric-clad silicon waveguides
Rajat Sharma, Matthew W. Puckett, Hung-Hsi Lin +2
We theoretically characterize the free-carrier plasma dispersion effect in fully-etched silicon waveguides, with various dielectric material claddings, due to fixed and interface c…
Spectral_Engineering_with_CMOS_compatible_SOI_Photonic_Molecules
Luis A. M. Barea, Felipe Valini, Guilherme F. M. de Rezende +1
Photonic systems based on microring resonators have a fundamental constrain given by the strict relationship among free spectral range (FSR), total quality factor (QT) and resonato…
Induced Optical Losses in Optoelectronic Devices due to Focused Ion Beam Damages
Felipe Vallini, Luís Alberto Mijan Barea, Elohim Fonseca dos Reis +2
A study of damages caused by gallium focused ion beam (FIB) into III-V compounds is presented. Potential damages caused by local heating, ion implantation, and selective sputtering…
Highly luminescent a-SiOx<Er>/SiO2/Si multilayer structure
Rossano Lang, David S. L. Figueira, Felipe Vallini +1
We have fabricated highly-luminescent samples with erbium-doped amorphous silicon sub-oxide (a-SiOx<Er>) layers on SiO2/Si substrates. The layers are designed to provide a resonanc…