We experimentally investigate the smallest germanium waveguide cavity resonators on silicon that can be designed to work around 1.55 μm wavelength and observe an almost 30-fold enhancement in the collected spontaneous emission per unit volume when compared to a continuous germanium film of the same thickness. The enhancement is due to an effective combination of (i) excitation enhancement at the pump wavelength, (ii) emission enhancement (Purcell effect) at the emission wavelength, and (iii) effective beaming by the nanoresonators, which act as optical antennas to enhance the radiation efficiency. Our results set a basis for the understanding and engineering of light emission based on subwavelength, CMOS-compatible nanostructures operating at telecommunication wavelengths.
Celebrano, M., Baselli, M., Bollani, M., Frigerio, J., Bahgat Shehata, A., Della Frera, A., et al. (2015). Emission engineering in germanium nanoresonators. ACS PHOTONICS, 2(1), 53-59 [10.1021/ph500432k].
Citazione: | Celebrano, M., Baselli, M., Bollani, M., Frigerio, J., Bahgat Shehata, A., Della Frera, A., et al. (2015). Emission engineering in germanium nanoresonators. ACS PHOTONICS, 2(1), 53-59 [10.1021/ph500432k]. | |
Tipo: | Articolo in rivista - Articolo scientifico | |
Carattere della pubblicazione: | Scientifica | |
Presenza di un coautore afferente ad Istituzioni straniere: | Si | |
Titolo: | Emission engineering in germanium nanoresonators | |
Autori: | Celebrano, M; Baselli, M; Bollani, M; Frigerio, J; Bahgat Shehata, A; Della Frera, A; Tosi, A; Farina, A; Pezzoli, F; Osmond, J; Wu, X; Hecht, B; Sordan, R; Chrastina, D; Isella, G; Duò, L; Finazzi, M; Biagioni, P | |
Autori: | ||
Data di pubblicazione: | 2015 | |
Lingua: | English | |
Rivista: | ACS PHOTONICS | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/ph500432k | |
Appare nelle tipologie: | 01 - Articolo su rivista |
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File | Descrizione | Tipologia | Licenza | |
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Ge_nanocavities.pdf | Preprint | Open Access Visualizza/Apri | ||
celebrano.acsphoton.15.pdf | Publisher's version | Administrator Richiedi una copia | ||
Biagioni_manuscript_revised.pdf | Postprint | Open Access Visualizza/Apri |