10 GHz electro-optical OR/NOR directed logic device based on silicon micro-ring resonators.

Area of Science:

• Photonics
• Integrated Optics
• Semiconductor Devices

Background:

• Micro-ring resonators (MRRs) are key components in integrated photonics for wavelength filtering and manipulation.
• Electric-field-induced carrier depletion in PN junctions offers a method for modulating optical signals in waveguides.
• Achieving high-speed, reliable logic operations in photonic devices is crucial for next-generation computing and communication.

Purpose of the Study:

• To demonstrate a functional OR/NOR directed logic device.
• To utilize cascaded MRRs modulated by electric-field-induced carrier depletion.
• To achieve high-speed operation for photonic logic applications.

Main Methods:

• Fabrication of a device comprising two cascaded MRRs with embedded PN junctions.
• Compensation of resonance wavelength mismatch using thermal tuning.
• Modulation of the MRRs using high-speed electrical signals applied to the PN junctions.
• Extraction of device working parameters from static response spectra.
• Experimental validation of OR/NOR logic operations at high speeds.

Main Results:

• Successful demonstration of an OR/NOR directed logic device.
• Compensation of fabrication-induced wavelength mismatch via thermal tuning.
• Extraction of critical device parameters including working wavelength and applied voltages.
• Achievement of OR/NOR logical operations at a speed of 10 GHz.

Conclusions:

• The presented cascaded MRR device effectively performs OR/NOR logic operations.
• Thermal tuning is a viable method for compensating fabrication errors in MRR devices.
• The device shows potential for high-speed photonic logic applications.
• This work contributes to the development of advanced optical computing and signal processing systems.