Top-Hat HELLISH-VCSOA for optical amplification and wavelength conversion for 0.85 to 1.3μm operation

Area of Science:

• Optoelectronics
• Semiconductor Physics
• Materials Science

Background:

• Vertical cavity semiconductor optical amplifiers (VCSOAs) are crucial components in optical communication.
• Hot electron light emission and lasing (HELLISH) offers an alternative mechanism for light generation in semiconductors.
• Modifications to existing device architectures can lead to improved performance.

Purpose of the Study:

• To characterize a modified HELLISH-VCSOA device with a distinct channel length ratio.
• To investigate the optical amplification properties of this novel semiconductor heterostructure.
• To explore the potential of HELLISH-VCSOA devices for advanced optoelectronic applications.

Main Methods:

• Fabrication of a GaAs p-i-n junction with multiple quantum wells.
• Integration of distributed Bragg reflector (DBR) mirrors for optical feedback.
• Characterization using current-voltage-light (I-V-L) measurements.
• Spectral analysis via photoluminescence, electroluminescence, and electro-photoluminescence.

Main Results:

• The device operates based on longitudinal current transport parallel to the GaAs p-n junction layers.
• Significant optical amplification of approximately 25 dB was achieved.
• Amplification was observed at applied voltages around 88 V.

Conclusions:

• The modified HELLISH-VCSOA demonstrates promising optical amplification capabilities.
• This device architecture represents a viable approach for developing advanced semiconductor optical amplifiers.
• Further research into HELLISH-VCSOA devices could lead to breakthroughs in optoelectronics.