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Related Concept Videos

Schottky Barrier Diode01:27

Schottky Barrier Diode

429
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
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Diode: Forward bias01:20

Diode: Forward bias

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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
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Diode: Reverse bias01:14

Diode: Reverse bias

885
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
885

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Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
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Photonically-driven Schottky diode based 0.3 THz heterodyne receiver.

Iñigo Belio-Apaolaza, James Seddon, Diego Moro-Melgar

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    PubMed
    Summary

    This study demonstrates a hybrid terahertz (THz) receiver using a Schottky barrier diode mixer pumped by a photonic local oscillator. This innovative approach combines the strengths of electronic and photonic technologies for high-performance THz applications.

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    Area of Science:

    • Terahertz (THz) technology
    • Photonics and optoelectronics
    • Microwave and millimeter-wave engineering

    Background:

    • Photonics offers advantages like wide tunability and fiber integration for emerging THz applications.
    • Terahertz receivers predominantly use electronic solutions, with Schottky barrier diodes (SBDs) favored for their room-temperature performance and maturity.
    • A need exists for hybrid solutions that leverage the benefits of both photonic and electronic components in THz systems.

    Purpose of the Study:

    • To demonstrate a subharmonic mixer (SHM) operating at 300 GHz utilizing a Schottky barrier diode (SBD) locally pumped by a photonic source.
    • To validate the performance of a hybrid Schottky-photonic THz receiver.
    • To showcase the feasibility of an all-photonics-based wireless bridge for high-speed data transmission.

    Main Methods:

    • Designed and manufactured a Schottky mixer prototype operating in the 270-320 GHz range.
    • Generated the local oscillator (LO) power by photomixing using a high-frequency, high-power uni-travelling-carrier photodiode (UTC-PD).
    • Integrated the photonic LO with the SBD mixer and characterized its performance, including conversion loss and dynamic range.
    • Implemented a 5 Gbps wireless bridge as a proof-of-concept demonstration.

    Main Results:

    • Achieved a minimum single-side-band conversion loss of 14.4 dB.
    • Measured a peak dynamic range of 130 dB.
    • Successfully demonstrated a 5 Gbps wireless bridge using the optically-pumped SBD mixer.

    Conclusions:

    • The study proves the feasibility of high-performance hybrid Schottky-photonic THz receivers.
    • This hybrid approach effectively combines the advantages of mature electronic detectors (SBDs) with advanced photonic local oscillators.
    • The demonstrated system offers a promising pathway for next-generation THz communication systems.