Multilayer Fabrication Of A Rainbow Of Microdisk Laser Particles Across A 500 Nm Bandwidth

Laser particles are an emerging technology with unique stimulated emission properties. The ability to produce laser particles over a wide spectral range is critical for massive wavelength-division multiplexing. Here we show a novel method to fabricate semiconductor microdisk laser particles with emission wavelengths spanning 500 nm from a single epitaxial wafer. The wafer consists of nine gain layers of InGaAsP with different quaternary compositions to cover lasing wavelengths from 1150 to 1650 nm. With optical pumping at 1064 nm, these particles are then used to track the movements of thousands of individual cells in vitro.