Research Groups‎ > ‎

Electronics and Optoelectronics

Short Description

The Electronics group research activity cuts across several disciplines in applied physics and engineering, which include semiconductor physics, solid-state electronics, organic electronics and optoelectronics. The team is also interested in complex systems, chaos, and synchronization of novel nanoelectronic devices for applications in information and communication technologies.

Members of the Research Group

Coordinator: José Figueiredo

 NameMain areas of expertise
 Bruno Romeira
Semiconductor physics, solid-state electronics, opto-electronics, non-linear dynamics
 José Figueiredo
Semiconductor physics, solid-state electronics, opto-electronics, non-linear dynamics
 Peter Stallinga
Electronics, organic electronics, device characterization, semiconductors
 Ricardo Avó
Telecommunications, computer networks, optical networks, radio over fiber and access networks

Main areas of expertise

The research in the 2008/2012 period can be divided into the following branches: Organic Electronics; Sensing; Electronic Instrumentation; Nano-electronics; and Optoelectronics. The group developed expertise on electrical measurements, which was recognized through collaboration requests from national and international groups and companies. This expertise was applied on different fields such as properties of thin films for transparent electronics, thin-film field-effect transistors and organic semiconductors. In parallel, innovative techniques and devices were investigated, with emphasis on metal-insulator-metal transistors and resonant tunneling diodes (RTDs). A group in CEOT specialized in the latter, developing novel optoelectronic oscillators incorporating RTDs coupled with diode lasers and/or photodiodes, with applications to state of the art technologies in microwave-photonics signal generation, chaos-based communications and as electrical optical (E/O) uplink and optical-electrical (O/E) downlink transponder for picocellular access of radio-over-fiber networks.

Recent Publications

de Boer, W. D. A. M., McGonigle, C., Gregorkiewicz, T., Fujiwara, Y., Tanabe, S., & Stallinga, P. (2014). Optical excitation and external photoluminescence quantum efficiency of Eu3+ in GaN. Scientific reports, 4.

Cantú, H. I., Romeira, B., Figueiredo, J. M., Kelly, A. E., & Ironside, C. N. (2013). Modulation accuracy of binary phase‐shift keying signal broadcast after injection locking of a resonant tunneling diode microwave oscillator. Microwave and Optical Technology Letters, 55(4), 705-711.

Pessoa, L. M., Monteiro, M. C., Pereira, M. R., Salgado, H. M., Romeira, B., & Figueiredo, J. M. L. (2013, June). Experimental evaluation of optimum modulation formats for pico-cellular access networks based on resonant tunneling diodes. In Transparent Optical Networks (ICTON), 2013 15th International Conference on (pp. 1-4). IEEE.

Krajewski, T. A., Stallinga, P., Zielony, E., Goscinski, K., Kruszewski, P., Wachnicki, L., ... & Godlewski, M. (2013). Trap levels in the atomic layer deposition-ZnO/GaN heterojunction—Thermal admittance spectroscopy studies. Journal of Applied Physics, 113(19), 194504.

Cantu, H. I., Ironside, C. N., Kelly, A. E., Romeira, B., & Figueiredo, J. M. L. (2013). An Optical to Wireless Data Link Using Radio Frequency Backscatter. IEEE microwave and wireless components letters, 23(2), 102-104.

Cantú, H. I., Salgado, H., Romeira, B., Kelly, A. E., Ironside, C. N., & Figueiredo, J. M. (2013). Wireless Interrogation of an Optically Modulated Resonant Tunnelling Diode Oscillator. Microwave and Optical Technology Letters, 55(8), 1728-1730.

Romeira, B., Javaloyes, J., Ironside, C. N., Figueiredo, J. M., Balle, S., & Piro, O. (2013). Excitability and optical pulse generation in semiconductor lasers driven by resonant tunneling diode photo-detectors. Optics express, 21(18), 20931-20940.

Cantú, H. I., Ironside, C. N., Romeira, B., Kelly, A. E., & Figueiredo, J. M. L. (2013, May). An optically modulated radio frequency backscatter wireless data link. In Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference (pp. 1-1). IEEE.

Romeira, B., Pessoa, L. M., Salgado, H. M., Ironside, C. N., & Figueiredo, J. M. (2013). Photo-Detectors Integrated with Resonant Tunneling Diodes. Sensors, 13(7), 9464-9482.

Romeira, B., Figueiredo, J. M., Ironside, C. N., & Quintana, J. M. (2013, November). Synchronization of optically coupled resonant tunneling diode oscillators. In 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications (pp. 87851Y-87851Y). International Society for Optics and Photonics.

Romeira, B., Avó, R., Javaloyes, J., Balle, S., Ironside, C. N., & Figueiredo, J. M. (2014). Stochastic induced dynamics in neuromorphic optoelectronic oscillators. Optical and Quantum Electronics, 1-6.

Wang, J., Wang, L., Li, C., Romeira, B., & Wasige, E. (2013). 28 GHz MMIC resonant tunnelling diode oscillator of around 1mW output power. Electronics Letters, 49(13).

Stallinga, P. (2014). Electrical characterization of organic (amorphous) electronic materials. physica status solidi (c).