Cesar Bartolo-Perez

Cesar Bartolo-Perez

Ph.D. in Electrical and Computer Engineering (UC Davis)

Posts by Collection

portfolio

Ultrafast avalanche photodetectors for imaging and ranging

Improving the time resolution and sensitivity of Avalanche Photodetectors (APDs-SPADs) is critical for increasing the resolution of Time-of-Flight imaging systems, optical communications, and fluorescence-based biosensors. My research is focused in enhancing the bandwidth, gain and detection efficiency of such detectors by controlling the depth of light absorption, delivering the light in critical regions of the semiconductor. This can be achieved by the implementation of novel photon trapping structures, that has been extensively studied in our lab and implemented in Silicon, Ge-on-Si and III-V photodetectors. 1

Silicon and Ge-on-Silicon PIN photodetectors for optical communications

We aim to enable monolithic integration of silicon photodiodes with the high-speed and responsivity with the receiver electronics in order to reduce the cost and improve the performance of short reach optical interconnects in data centers. In addition, we are developing highly sensitive Germanium on Silicon photodiodes. These photodiodes have potential for many applications, such as inter-/intra-datacenters, passive optical networks, metro and long-haul dense wavelength division multiplexing systems, eye-safe lidar systems, and quantum communications.

Photonic Integrated Biosensors

Silicon photonics allow the integration of ultra-sensitive biosensors in small, portable chips. I am collaborating the fabrication of photonic integrated molecular biosensor in a Silicon Nitride platform. The project involves the design of waveguides, splitters, MZI and ring resonators in a device and a system level. Such work is done in collaboration with the department of Chemical Engineering.

publications

A new paradigm in high-speed and high-efficiency silicon photodiodes for communication-Part II: device and VLSI integration challenges for low-dimensional structures

Published in IEEE Transactions on Electron Devices, 2017

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Recommended citation: H. Cansizoglu et al., "A New Paradigm in High-Speed and High-Efficiency Silicon Photodiodes for Communication-Part II: Device and VLSI Integration Challenges for Low-Dimensional Structures," IEEE Transactions on Electron Devices, vol. 65, no. 2, pp. 382-391, 2018. http://cesarbartolo.github.io/files/new_paradigm.pdf

High-Speed High-Efficiency Photon-Trapping Broadband Silicon PIN Photodiodes for Short-Reach Optical Interconnects in Data Centers

Published in Journal of Lightwave Technology, 2019

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Recommended citation: S. Ghandiparsi et al., "High-Speed High-Efficiency Photon-Trapping Broadband Silicon PIN Photodiodes for Short-Reach Optical Interconnects in Data Centers," Journal of Lightwave Technology, vol. 37, no. 23, pp. 5748-5755, 2019. http://cesarbartolo.github.io/files/ligthwave_technology.pdf

Avalanche photodetectors with photon trapping structures for biomedical imaging applications

Published in Optics Express, 2021

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Recommended citation: Cesar Bartolo-Perez, Soroush Chandiparsi, Ahmed S. Mayet, Hilal Cansizoglu, Yang Gao, Wayesh Qarony, Ahasan AhAmed, Shih-Yuan Wang, Simon R. Cherry, M. Saif Islam, and Gerard Arino-Estrada, "Avalanche photodetectors with photon trapping structures for biomedical imaging applications," Opt. Express 29, 19024-19033 (2021) http://cesarbartolo.github.io/files/avalanche-biomedical.pdf

Engineering the gain and bandwidth in avalanche photodetectors

Published in Optics Express, 2022

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Recommended citation: Cesar Bartolo-Perez, Ahasan Ahamed, Ahmed S. Mayet, Amita Rawat, Lisa McPhillips, Soroush Ghandiparsi, Julien Bec, Gerard Arino-Estrada, Simon Cherry, Shih-Yuan Wang, Laura Marcu, and M. Saif Islam, "Engineering the gain and bandwidth in avalanche photodetectors," Opt. Express 30, 16873-16882 (2022) http://cesarbartolo.github.io/files/engineering-penetrationdepth.pdf

talks

teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

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Teaching experience 2

Workshop, University 1, Department, 2015

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