Rare earth emitters are promising in integrated optics but require complex integration on silicon. In this work, we have fabricated an Y2O3:Eu3+ micro-emitter on SiO2 on Si substrate without etching. Since pulsed laser deposition produces a high quality layer at room temperature, material can be locally deposited on top of substrates by lift-off processing. After annealing, microstructures exhibit good crystallographic quality with controlled dimensions for light confinement and narrow emission. This works allows envisioning rare-earth doped micro-photonic structures directly integrated on silicon without etching, which opens the way to integration of new functional materials on silicon platform.
Micro-structuration of rare earth doped materials by liftoff processing in pulsed laser deposited layers are promising in photonics since they do not require etching. In this work, we present our recent progress in the fabrication and characterization of such structures for visible and infrared emission. Different kinds of devices have been investigated (micro-disks, micro-strips, grating and so one), with different host materials (Y2O3 and Al2O3) and dopant (Eu3+ and Er3+ ions). We show here that the shape and the material of the microstructures can be chosen to control the light for different wavelength ranges. This work opens the way of the easy realization of efficient micro-emitter for photonics applications.
In this Letter, we describe a fabrication process for current injection into micrometer-size Ag/GaAs Tamm emitting diodes. It requires a special care to minimize surface damages as the Tamm mode is localized very close to the surface. Electroluminescence from GaAs quantum wells is demonstrated at room temperature, with a dispersion that follows the Tamm mode. For small diameters Tamm structures, in-plane confinement leads to electroluminescence into discretized energy modes. The observation of electrically excited emission from a confined diode is an important step toward the development of Tamm plasmon optical devices with new functionalities.
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