51 citations · 183 across the 7 of their papers we have counts for
7 papers
Infrared vertically-illuminated photodiode for chip alignment feedback
Luca Alloatti, Rajeev Jagga Ram
We report on vertically-illuminated photodiodes fabricated in the GlobalFoundries 45nm 12SOI node and on a packaging concept for optically-interconnected chips. The photodiodes are…
Resonance-enhanced waveguide-coupled silicon-germanium detector
Luca Alloatti, Rajeev Jagga Ram
A photodiode with 0.550.1 A/W responsivity at a wavelength of 1176.9 nm has been fabricated in a 45 nm microelectronics silicon-on-insulator foundry process. The resonant wave…
High-speed modulator with interleaved junctions in zero-change CMOS photonics
Luca Alloatti, Dinis Cheian, Rajeev Jagga Ram
A microring depletion modulator is demonstrated with T-shaped lateral p-n junctions used to realize efficient modulation while maximizing the RC limited bandwidth. The device havin…
Optical loss by surface transfer doping in silicon waveguides
Luca Alloatti, Christian Koos, Juerg Leuthold
We show that undoped silicon waveguides may suffer of up to 1.8 dB/cm free-carrier absorption caused by improper surface passivation. To verify the effects of free-carriers we appl…
Second-order nonlinear optical metamaterials: ABC-type nanolaminates
Luca Alloatti, Clemens Kieninger, Andreas Froelich +7
Structuring optical materials on a nanometer scale can lead to artificial effective media, or metamaterials, with strongly altered optical behavior. Metamaterials can provide a wid…
Photonics design tool for advanced CMOS nodes
Luca Alloatti, Mark Wade, Vladimir Stojanovic +2
Recently, the authors have demonstrated large-scale integrated systems with several million transistors and hundreds of photonic elements. Yielding such large-scale integrated syst…
Conductance and density of states anomalies as resonances of energy bands in disordered coupled chains
L. Alloatti, G. Grosso
We show that off-diagonal nearest neighbor disorder in quasi-one-dimensional single particle tight-binding coupled chains leads to anomalies in the density of states and in the mea…