Recent Research Activities (as of July 2001)

Semiconductor Light-Controlling Devices

• Polarization insensitive and negative chirp MQW EA modulators
• All optical switch/ wavelength converter based on MQW EA modulaltors
• Low voltage optical switch by potential-tailored coupled quantum wells
• Wavelength converter based on directionally coupled semiconductor optical amplifier (DCSOA); fabrication and characteristics

Semiconductor Light Sources

• InAsP/InP quantum wire DFB lasers fabricated by mass transport method
• Wavelength trimming technology for WDM distributed feedback laser arrays
• Compensation of LD temperature characteristics by bi-metal heatsinks
• All optical flip flop by a directionally-coupled dual mode laser

Monolithically-Integrated Photonic Circuits

• MZI SOA all-optical switches by selective area MOVPE
• InP arrayed waveguide grating for WDM phtonic circuits
• Metal waveguides for photonic integrated circuits

Processing Technologies for Monolithic Integration

• Experimental and numerical analysis of MOVPE growth kinetics
• Selective area MOVPE growth for monolithically integrated optical devices
• Cyclic Reactive Ion Beam Etching of InP- and GaN-Related Materials
• Heterointerface control by in-situ spectroscopic ellipsometry observation in MOVPE