Photo-Detectors Integrated with Resonant Tunneling Diodes
AbstractWe report on photo-detectors consisting of an optical waveguide that incorporates a resonant tunneling diode (RTD). Operating at wavelengths around 1.55 μm in the optical communications C band we achieve maximum sensitivities of around 0.29 A/W which is dependent on the bias voltage. This is due to the nature of RTD nonlinear current-voltage characteristic that has a negative differential resistance (NDR) region. The resonant tunneling diode photo-detector (RTD-PD) can be operated in either non-oscillating or oscillating regimes depending on the bias voltage quiescent point. The oscillating regime is apparent when the RTD-PD is biased in the NDR region giving rise to electrical gain and microwave self-sustained oscillations Taking advantage of the RTD’s NDR distinctive characteristics, we demonstrate efficient detection of gigahertz (GHz) modulated optical carriers and optical control of a RTD GHz oscillator. RTD-PD based devices can have applications in generation and optical control of GHz low-phase noise oscillators, clock recovery systems, and fiber optic enabled radio frequency communication systems.
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Romeira, B.; Pessoa, L.M.; Salgado, H.M.; Ironside, C.N.; Figueiredo, J.M.L. Photo-Detectors Integrated with Resonant Tunneling Diodes. Sensors 2013, 13, 9464-9482.
Romeira B, Pessoa LM, Salgado HM, Ironside CN, Figueiredo JML. Photo-Detectors Integrated with Resonant Tunneling Diodes. Sensors. 2013; 13(7):9464-9482.Chicago/Turabian Style
Romeira, Bruno; Pessoa, Luis M.; Salgado, Henrique M.; Ironside, Charles N.; Figueiredo, José M.L. 2013. "Photo-Detectors Integrated with Resonant Tunneling Diodes." Sensors 13, no. 7: 9464-9482.