Multi-colour nanowire photonic crystal laser pixels.

摘要: Emerging applications such as solid-state lighting and display technologies require micro-scale vertically emitting lasers with controllable distinct lasing wavelengths broad wavelength tunability arranged in desired geometrical patterns to form “super-pixels”. Conventional edge-emitting current surface-emitting that abrupt changes semiconductor bandgaps or cavity length are not a viable solution. Here, we successfully address these challenges by introducing new paradigm extends the laser tuning range additively employing multiple monolithically grown gain sections each different emission centre wavelength. We demonstrate this using gain-bandwidth III-nitride quantum well (MQW) heterostructures novel top-down nanowire photonic crystal nanofabrication. obtain single-mode blue-violet spectral region remarkable 60 nm of (or 16% nominal wavelength) is determined purely geometry. This approach can be extended cover entire visible spectrum.