246 citations · 748 across the 12 of their papers we have counts for
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Precise and diffraction-limited waveguide-to-free-space focusing gratings
Karan K. Mehta, Rajeev J. Ram
We present the design and characterization of waveguide grating devices that couple visible-wavelength light at nm from single-mode, high index-contrast dielectric waveguid…
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…