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Phase-resolved measurement and control of ultrafast dynamics in terahertz electronic oscillators. | LitMetric

AI Article Synopsis

  • Terahertz (THz) electronic oscillators are crucial for the development of next-generation wireless communications, particularly 6G, due to their ability to enable high-speed data transmission and precise beam steering.
  • The authors overcome the limitations of traditional electronic equipment by using photonic technology, specifically a femtosecond laser to generate THz pulses that phase-lock electronic oscillators.
  • Their research reveals unique ultrafast behaviors, like anti-phase locking, and aligns with universal synchronization theories, offering guidelines for improving THz electronic oscillator performance in future wireless technologies.

Article Abstract

As a key component for next-generation wireless communications (6 G and beyond), terahertz (THz) electronic oscillators are being actively developed. Precise and dynamic phase control of ultrafast THz waveforms is essential for high-speed beam steering and high-capacity data transmission. However, measurement and control of such ultrafast dynamic process is beyond the scope of electronics due to the limited bandwidth of the electronic equipment. Here we surpass this limit by applying photonic technology. Using a femtosecond laser, we generate offset-free THz pulses to phase-lock the electronic oscillators based on resonant tunneling diode. This enables us to perform phase-resolved measurement of the emitted THz electric field waveform in time-domain with sub-cycle time resolution. Ultrafast dynamic response such as anti-phase locking behaviour is observed, which is distinct from in-phase stimulated emission observed in laser oscillators. We also show that the dynamics follows the universal synchronization theory for limit cycle oscillators. This provides a basic guideline for dynamic phase control of THz electronic oscillators, enabling many key performance indicators to be achieved in the new era of 6 G and beyond.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11219870PMC
http://dx.doi.org/10.1038/s41467-024-48782-4DOI Listing

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