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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Optical flip-flop based on parallel-connected AlGaAs/GaAs pnpn structures.

K Hara, K Kojima, K Mitsunaga

|September 22, 2009

Summary

This summary is machine-generated.

This study introduces the first optical flip-flop utilizing parallel-connected pnpn (thyristor) structures. This device enables efficient optical switching and state retention for advanced optical computing systems.

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Area of Science:

Optoelectronics
Semiconductor Devices
Optical Computing

Background:

Flip-flops are fundamental building blocks in digital electronics, traditionally implemented using electronic components.
Optical computing offers potential advantages in speed and parallelism over electronic computing.
PNPN (thyristor) structures exhibit unique switching characteristics suitable for optoelectronic applications.

Purpose of the Study:

To demonstrate the first optical flip-flop based on parallel-connected pnpn structures.
To investigate the use of differential optical switching for state inversion.
To explore the carrier dissipation mechanism for state retention in the optical flip-flop.

Main Methods:

Fabrication of an AlGaAs/GaAs device incorporating parallel-connected pnpn structures.
Implementation of a differential optical switching technique for flip-flop state control.
Analysis of carrier dynamics within the gate layers for state holding.

Main Results:

Successful demonstration of an optical flip-flop operation.
Achieved flip-flop operation with a low optical input energy of 7.2 pJ.
Exhibited high on-off contrast and high optical gain.

Conclusions:

The developed optical flip-flop is the first of its kind using parallel pnpn structures.
The device shows promise for optical parallel processing systems due to its scalability and performance.
Further development could lead to integrated optical circuits for advanced computing applications.