Study of Ultrafast Semiconductor Photoswitches for CW RF Signal Sampling and Modulation

Kuppam, Mohan Babu; Lampin, Jean‐François; Peytavit, E.; Roux, Jean‐François; Coutaz, Jean‐Louis

doi:10.1109/jlt.2014.2334063

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Another potential application of such ultrafast PSW is modulation or demodulation of RF signals with optical signals using the PSW as a hybrid (optical / electronic) mixer [6,7]. Here we have investigated the potentiality of the InGaAs PSW to perform this operation in an experiment which is very similar to the previous one.…”

Section: Heterodyne Demodulation Of Amplitude Modulated Rf Signalsmentioning

confidence: 91%

“…For that it has been shown that simple Metal-Semiconductor-Metal (MSM) photoswitches (PSW) made from Low-Temperature-Grown (LTG) GaAs could reach these requirements. Hence, this component has been used as ultrafast optoelectronic sampler for ADC [4,5] and mixer showing applications in the RF band as well as in the THz one [6,7]. Its principle rely on the increase of the electrical conductance of the semiconductor through absorption of the optical beam, making this device an optically controlled resistance.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast InGaAs photoswitch for RF signal processing

Horváth

Roux

Coutaz

et al. 2017

2017 International Conference on Optical Network Design and Modeling (ONDM)

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Optical processing of RF signals is demonstrated in this communication using photoswitches made from Nitrogen Implanted InGaAs. The sampling device shows an ultrafast picosecond response time while activated by ultra-short optical pulses or modulated optical beam centered at the wavelength of 1.55 µm. The optoelectronic device is embedded in a microwave coplanar waveguide which has a high electrical bandwidth allowing to process signals in the 1-67 GHz band. We investigate the potentiality of this component to be used either in photonic assisted sampling for future Analog to Digital Converters or in photonic assisted heterodyne detection of RF modulated carriers.

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Section: Heterodyne Demodulation Of Amplitude Modulated Rf Signalsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Ultrafast InGaAs photoswitch for RF signal processing

Horváth

Roux

Coutaz

et al. 2017

2017 International Conference on Optical Network Design and Modeling (ONDM)

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“…Since their development in the mid-80s, − THz photoconductive switches have been used primarily for spectroscopy in the THz frequency band (0.1–10 THz) . Additionally, due to their ability to generate picosecond voltage pulses, photoconductive switches have also been used for probing ultrafast dynamics in semiconductors, high frequency characterization of electronic circuits, processing of radio frequency (RF) signals, and high speed wireless communications . For a long period of time, research around THz photoconductive switches was focused on improving their time response, namely, from 15 ps to the subpicosecond time scale .…”

Section: Photoconductive Switch Design and Photonic Modelingmentioning

confidence: 99%

Efficient Three-Dimensional Photonic–Plasmonic Photoconductive Switches for Picosecond THz Pulses

et al. 2020

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The efficiency of photoconductive switches, which continue to be used for the generation and detection of THz waves, has been overlooked for a long time. The so far “optics-dominated” devices are making their way through to new and emerging fields of research that require ultrafast picosecond voltage pulses, as well as to new applications where power efficiency is of uttermost importance. To address the efficiency problems, in this Article we present a novel photoconductive switch that is based on a three-dimensional design. In contrast to conventional planar designs, our photoconductive switch drastically enhances the overall efficiency by maximizing the laser absorption within the device, while at the same time optimizing the carrier collection efficiency at the electrodes. To maximize the optical absorption, we take advantage of photonic and plasmonic modes that are excited in our device due to a periodic array of nanopillars, whereas the collection efficiency is optimized by converting each nanopillar into a single nano-photoconductive switch. Our numerical calculations show a 50-fold increase in the overall generated current and a 5-fold bandwidth increase compared to traditional interdigitated planar photoconductive switches. This opens up a wealth of new possibilities in quantum science and technology where efficient low power devices are indispensable.

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“…As mentioned above, one of the potential applications of ultrafast PSWs is modulation (or demodulation) of RF signals by optical means using the device as a hybrid optoelectronic mixer [6]. Such an application has already been investigated using phototransistors [27] or ultrafast unitravelling-carrier photodiodes (UTCPD) [28].…”

Section: Heterodyne Demodulation Of Amplitude Modulated Rf Signalsmentioning

confidence: 99%

Characterization of ultrafast InGaAs photoconductors and their application to signal processing in radio-over-fibre telecommunications

Horváth¹,

Roux²,

Coutaz³

et al. 2018

physics

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Characterization of nitrogen ion implanted InGaAs photoconductive devices is performed in both the electronic and optoelectronic regime. In the dark state, the optoelectronic device shows a dark resistance of a few kΩ and a wide electrical bandwidth in the RF domain. This large bandwidth is also confirmed in the illuminated state, optoelectronic autocorrelation experiments performed with ultra-short optical pulses allow us to measure the picosecond optoelectronic time response of the device. In the second part of the work, we investigate the potentiality of this component to be used in the photonic assisted heterodyne detection of RF modulated carriers for radio-over-fibre telecommunications. We demonstrate that this photoconductor, thanks to its properties, can be used to demodulate complex data modulation formats in such an experiment.

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Study of Ultrafast Semiconductor Photoswitches for CW RF Signal Sampling and Modulation

Cited by 4 publications

References 21 publications

Ultrafast InGaAs photoswitch for RF signal processing

Ultrafast InGaAs photoswitch for RF signal processing

Efficient Three-Dimensional Photonic–Plasmonic Photoconductive Switches for Picosecond THz Pulses

Characterization of ultrafast InGaAs photoconductors and their application to signal processing in radio-over-fibre telecommunications

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