Organic\nJanus Microspheres: A General Approach to\nAll-Color Dual-Wavelength Microlasers

Abstract

We propose a general approach for\nobtaining dual-wavelength organic\nmicrolasers in amphiphilic Janus resonators, where hydrophilic and\nhydrophobic dyes can be spatially separated via polarity-driven encapsulation.\nLow-threshold dual-wavelength lasing was achieved in a single Janus\nparticle with well-modulated output. This universal approach enables\nflexibly designing the lasing wavelength of the Janus microlasers\nin the full visible spectrum by systematically altering the encapsulated\nlaser dyes. Our findings demonstrate a promising route to the photonic\nintegration at the micro-/nanoscale that may lead to the innovation\nof concepts and device architectures for multifunctional optoelectronic\napplications.