Sensors 2013, 13(7), 9464-9482; doi:10.3390/s130709464

Photo-Detectors Integrated with Resonant Tunneling Diodes

1,* email, 2email, 2email, 3email and 1email
Received: 14 June 2013; in revised form: 9 July 2013 / Accepted: 16 July 2013 / Published: 22 July 2013
(This article belongs to the Special Issue Photodetectors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We 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.
Keywords: double barrier quantum well structures; clock recovery; microwave-photonics; optical injection locking; optoelectronic circuits; oscillators; photo-detectors; radio-over-fiber; resonant tunneling diodes
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MDPI and ACS Style

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.

AMA Style

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.

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