Detection of a 2.8 THz quantum cascade laser with a semiconductor nanowire field-effect transistor coupled to a bow-tie antenna

Ravaro, M.; Locatelli, Massimiliano; Viti, Leonardo; Ercolani, Daniele; Consolino, Luigi; Bartalini, S.; Sorba, L.; Vitiello, Miriam S.; Natale, P. De

doi:10.1063/1.4867074

Cited by 22 publications

(16 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38 In those devices, the transition between a sub-THz to a few-THz detection does not affect the active element (i.e., the rectifier), but only the coupling architecture: the antenna dimensions shrink to match shorter wavelengths.…”

Section: -3mentioning

confidence: 99%

Black phosphorus nanodevices at terahertz frequencies: Photodetectors and future challenges

2017

View full text Add to dashboard Cite

The discovery of graphene triggered a rapid rise of unexplored two-dimensional materials and heterostructures having optoelectronic and photonics properties that can be tailored on the nanoscale. Among these materials, black phosphorus (BP) has attracted a remarkable interest thanks to many favorable properties, such as high carrier mobility, in-plane anisotropy, the possibility to alter its transport via electrical gating and direct band-gap, that can be tuned by thickness from 0.3 eV (bulk crystalline) to 1.7 eV (single atomic layer). When integrated in a microscopic field effect transistor (FET), a few-layer BP flake can detect Terahertz (THz) frequency radiation. Remarkably, the in-plane crystalline anisotropy can be exploited to tailor the mechanisms that dominate the photoresponse; a BP-based field effect transistor can be engineered to act as a plasma-wave rectifier, a thermoelectric sensor or a thermal bolometer. Here we present a review on recent research on BP detectors operating from 0.26 THz to 3.4 THz with particular emphasis on the underlying physical mechanisms and the future challenges that are yet to be addressed for making BP the active core of stable and reliable optical and electronic technologies.

show abstract

Section: -3mentioning

confidence: 99%

Black phosphorus nanodevices at terahertz frequencies: Photodetectors and future challenges

2017

View full text Add to dashboard Cite

show abstract

“…A bolometric InAs-nanowire field-effect transistor detector has been demonstrated 25 , and exploited for continuous-wave THz imaging applications 26,27 . More recently, a bolometric detector based upon carbon nanotubes has also been reported 28 .…”

mentioning

confidence: 99%

Single Nanowire Photoconductive Terahertz Detectors

et al. 2014

View full text Add to dashboard Cite

Spectroscopy and imaging in the terahertz (THz) region of the electromagnetic spectrum has proven to provide important insights in fields as diverse as chemical analysis, materials characterization, security screening, and nondestructive testing. However, compact optoelectronics suited to the most powerful terahertz technique, time-domain spectroscopy, are lacking. Here, we implement single GaAs nanowires as microscopic coherent THz sensors and for the first time incorporated them into the pulsed time-domain technique. We also demonstrate the functionality of the single nanowire THz detector as a spectrometer by using it to measure the transmission spectrum of a 290 GHz low pass filter. Thus, nanowires are shown to be well suited for THz device applications and hold particular promise as near-field THz sensors.

show abstract

“…Based on these considerations, we found that the responsivity of sample A at V G = 0 V 6 is R nw = 2.5 V/W (see Methods), more than a factor of two larger than that achieved in THz NW detectors operating at lower frequencies (2.8 THz) in the standard far-field architecture. 31 For sample B, the unbiased responsivity is one order of magnitude lower (R BP = 0.17 V/W).…”

Section: Alternatively the Incident Thz Wave Can Induce A Sd Voltagementioning

confidence: 98%

Near-field terahertz probes with room-temperature nanodetectors for subwavelength resolution imaging

Mitrofanov

Viti

Dardanis

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Near-field imaging with terahertz (THz) waves is emerging as a powerful technique for fundamental research in photonics and across physical and life sciences. Spatial resolution beyond the diffraction limit can be achieved by collecting THz waves from an object through a small aperture placed in the near-field. However, light transmission through a sub-wavelength size aperture is fundamentally limited by the wave nature of light. Here, we conceive a novel architecture that exploits inherently strong evanescent THz field arising within the aperture to mitigate the problem of vanishing transmission. The sub-wavelength aperture is originally coupled to asymmetric electrodes, which activate the thermo-electric THz detection mechanism in a transistor channel made of flakes of black-phosphorus or InAs nanowires. The proposed novel THz near-field probes enable room-temperature sub-wavelength resolution coherent imaging with a 3.4 THz quantum cascade laser, paving the way to compact and versatile THz imaging systems and promising to bridge the gap in spatial resolution from the nanoscale to the diffraction limit.

show abstract

Detection of a 2.8 THz quantum cascade laser with a semiconductor nanowire field-effect transistor coupled to a bow-tie antenna

Cited by 22 publications

References 21 publications

Black phosphorus nanodevices at terahertz frequencies: Photodetectors and future challenges

Black phosphorus nanodevices at terahertz frequencies: Photodetectors and future challenges

Single Nanowire Photoconductive Terahertz Detectors

Near-field terahertz probes with room-temperature nanodetectors for subwavelength resolution imaging

Contact Info

Product

Resources

About