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Single-Mode Emission in InP Microdisks on Si Using Au Antenna

[Image: see text] An important building block for on-chip photonic applications is a scaled emitter. Whispering gallery mode cavities based on III–Vs on Si allow for small device footprints and lasing with low thresholds. However, multimodal emission and wavelength stability over a wider range of te...

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Detalles Bibliográficos
Autores principales: Tiwari, Preksha, Fischer, Anna, Scherrer, Markus, Caimi, Daniele, Schmid, Heinz, Moselund, Kirsten E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9026291/
https://www.ncbi.nlm.nih.gov/pubmed/35480488
http://dx.doi.org/10.1021/acsphotonics.1c01677
Descripción
Sumario:[Image: see text] An important building block for on-chip photonic applications is a scaled emitter. Whispering gallery mode cavities based on III–Vs on Si allow for small device footprints and lasing with low thresholds. However, multimodal emission and wavelength stability over a wider range of temperature can be challenging. Here, we explore the use of Au nanorod antennae on InP whispering gallery mode lasers on Si for single-mode emission. We show that by proper choice of the antenna size and positioning, we can suppress the side modes of a cavity and achieve single-mode emission over a wide excitation range. We establish emission trends by varying the size of the antenna and show that the far-field radiation pattern differs significantly for devices with and without antenna. Furthermore, the antenna-induced single-mode emission is dominant from room temperature (300 K) down to 200 K, whereas the cavity without an antenna is multimodal and its dominant emission wavelength is highly temperature-dependent.