Ultrasmall InGa(As)P dielectric and plasmonic nanolasers

TL;DR

This paper reports the development of ultrasmall InGaP and InGaAsP nanolasers with room-temperature, single-mode lasing capabilities, including plasmonic lasing on gold, suitable for biological and integrated photonic applications.

Contribution

It introduces ultrasmall, wafer-scale fabricated InGaP and InGaAsP nanodisks that achieve room-temperature lasing, including plasmonic lasing, with potential for bioimaging and on-chip light sources.

Findings

Achieved room-temperature, single-mode lasing from 360 nm diameter disks.

Demonstrated plasmon polariton lasing on gold substrates.

Produced stable sub-nanometer spectra within biological cells.

Abstract

Nanolasers have great potential as both on-chip light sources and optical barcoding particles. We demonstrate ultrasmall InGaP and InGaAsP disk lasers with diameters down to 360 nm (198 nm in height) in the red spectral range. Optically pumped, room-temperature, single-mode lasing was achieved from both disk-on-pillar and isolated particles. When isolated disks were placed on gold, plasmon polariton lasing was obtained with Purcell-enhanced stimulated emission. UV lithography and plasma ashing enabled the fabrication of nanodisks on a wafer-scale, with intended random size variation. Silica-coated nanodisk particles generated stable sub-nanometer spectra from within biological cells across an 80 nm bandwidth from 635 to 715 nm.