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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Integrated photonics with programmable non-volatile memory.

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Researchers developed a novel photonics memory cell (PMC) for energy-efficient, non-volatile data storage in silicon photonics integrated circuits (Si-PICs). This innovation enables optical reading of memory states, addressing a key limitation in current Si-PIC technology.

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Area of Science:

  • Photonics
  • Integrated Circuits
  • Non-volatile Memory

Background:

  • Silicon photonics integrated circuits (Si-PICs) are advancing for optical communications but lack non-volatile memory.
  • Current Si-PICs cannot efficiently store data, hindering energy-efficient applications.

Purpose of the Study:

  • To propose and demonstrate an electrically programmable, multi-level non-volatile photonics memory cell (PMC).
  • To integrate PMC into micro-ring resonators (MRRs) for optical memory state readout.
  • To explore solutions for the von Neumann bottleneck in computing.

Main Methods:

  • Fabrication of a PMC using standard complementary-metal-oxide-semiconductor (CMOS) compatible processes.
  • Integration of the PMC with a micro-ring resonator (MRR) for optical readout.
  • Demonstration of a MRR memory array for multi-bit storage and retrieval.

Main Results:

  • Achieved switching energy below 20 pJ for the photonics memory cell.
  • Demonstrated a four-bit memory read capacity using a MRR memory array.
  • Showcased potential for significantly increased storage capacity with broadband light sources.

Conclusions:

  • The developed PMC offers a pathway to energy-efficient, non-volatile optical data storage in Si-PICs.
  • This technology can overcome the von Neumann bottleneck and enhance computational performance.
  • The optical storage solution complements on-chip interconnects for various computing-intensive applications.