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Proceedings Paper

Si-based resonant cavity light-emitting devices
Author(s): Maria Eloisa Castagna; Salvatore Coffa; Anna Muscara; Alessandro Costa; Sebastiano Ravesi; Simona Lorenti; Marco Camalleri
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Paper Abstract

We report on the fabrication and characterization of Si/SiO2 Fabry-Perot microcavities. These structures are used to enhance the external quantum emission along the cavity axis and the spectral purity of emission from Rare earth doped and undoped SiOx (x <= 2)films that are used as active media to fabricate a Si based RCLED (Resonant Cavity Light emitting Devices). These structures are fabricated by chemical vapour deposition on a silicon substrate. The microcavities are tuned at different wavelengths: 540nm, 980nm, 1540nm, 780nm and 850nm (characteristic emission wavelength respectively for Tb, Yb and Er and Silicon Rich Oxide (SRO)). The reflectivity of the microcavities is of 97% and the factor quality ranges from 50 (for the cavity tuned at 540nm) to 95 (for the cavities tuned at 980nm and 1540nm) and 150 (for the cavity tuned at 780nm and 850 nm). These cavities have been characterized by TEM analysis to evaluate films uniformity, thickness and densification after annealing process for temperature ranging from 800° to 1100°C. The reflectivity and photoluminescence spectra show resonant wavelengths in agreement with the calculated values. A new structure to electrically pump the active media has been designed. The electrical properties of the active media have been analysed. An enhancement of the photoluminescence signal of twenty times have been achieved for the selected emission wavelength.

Paper Details

Date Published: 21 June 2004
PDF: 10 pages
Proc. SPIE 5366, Light-Emitting Diodes: Research, Manufacturing, and Applications VIII, (21 June 2004); doi: 10.1117/12.529135
Show Author Affiliations
Maria Eloisa Castagna, STMicroelectronics (Italy)
Salvatore Coffa, STMicroelectronics (Italy)
Anna Muscara, STMicroelectronics (Italy)
Alessandro Costa, STMicroelectronics (Italy)
Sebastiano Ravesi, STMicroelectronics (Italy)
Simona Lorenti, STMicroelectronics (Italy)
Marco Camalleri, STMicroelectronics (Italy)

Published in SPIE Proceedings Vol. 5366:
Light-Emitting Diodes: Research, Manufacturing, and Applications VIII
Steve A. Stockman; H. Walter Yao; E. Fred Schubert, Editor(s)

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