Ultrasmall InGa(As)P Dielectric and Plasmonic Nanolasers

Nanolasers have great potential for both on-chip lightsourcesand optical barcoding particles. We demonstrate ultrasmall InGaP andInGaAsP disk lasers with diameters down to 360 nm (198 nm in height)in the red spectral range. Optically pumped, room-temperature, single-modelasing was achieved from both disk-on-pillar and isolated particles.When isolated disks were placed on gold, plasmon polariton lasingwas obtained with Purcell-enhanced stimulated emission. UV lithographyand plasma ashing enabled wafer-scale fabrication of nanodisks withan intended random size variation. Silica-coated nanodisk particlesgenerated stable subnanometer spectra from within biological cellsacross an 80 nm bandwidth from 635 to 715 nm.

Automated summary

Nanolasers with ultrasmall InGaP and InGaAsP disk structures have been demonstrated, offering potential applications in on-chip lightsources and optical barcoding particles. Single-mode lasing was achieved from both disk-on-pillar and isolated particles, with Purcell-enhanced stimulated emission obtained when isolated disks were placed on gold. Wafer-scale fabrication of nanodisks with random size variation was enabled by UV lithography and plasma ashing. Silica-coated nanodisk particles generated stable subnanometer spectra within biological cells across a wide bandwidth.