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Porous Silicon Microcavities Based Photonic Barcodes

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Advanced Materials · Journal article · 2 May 2011

F. Ramiro-Manzano, R. Fenollosa, E. Xifré-Pérez, M. Garín and F. Meseguer

Advanced Materials

Volume 23

Pages 3022-3025

2011

Article summary

Here, we show that the photoluminescence emission of a single porous silicon colloid is strongly coupled to the whispering-gallery modes of the microcavity defined by the colloid itself, resulting in a unique photoluminescence spectrum with a high quantum yield. This spectrum depends on the colloid size and porosity, and constitutes a fingerprint of the particle. The authors propose a photonic encoding procedure in which a unique barcode can be assigned to each colloid through its photoluminescence spectrum.

How to cite

Initials first

F. Ramiro-Manzano, R. Fenollosa, E. Xifré-Pérez, M. Garín and F. Meseguer. “Porous Silicon Microcavities Based Photonic Barcodes.” Adv. Mater. 23, 3022-3025 (2011). DOI: 10.1002/adma.201100986.

Family name first

Ramiro-Manzano, F., Fenollosa, R., Xifré-Pérez, E., Garín, M. and Meseguer, F. “Porous Silicon Microcavities Based Photonic Barcodes.” Adv. Mater. 23, 3022-3025 (2011). DOI: 10.1002/adma.201100986.

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Figures

Four optical microscopy images of porous silicon microspheres showing different scattered colours
Figure 1. Optical microscopy images at 1000X magnification of porous silicon microspheres showing different scattered colours. The images were taken in reflection mode. The microsphere diameters are approximately 3.5 μm (a), 3.2 μm (b), 3.6 μm (c) and 3.7 μm (d).

From F. Ramiro-Manzano et al., Advanced Materials 23, 3022-3025 (2011), DOI 10.1002/adma.201100986. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA. Reused by the authors under Wiley's contributor reuse terms.

Transmittance and photoluminescence spectra of a porous silicon microsphere with complete axes
Figure 2. Transmittance (a) and photoluminescence (b) spectra of an approximately 4.1 μm diameter porous silicon microsphere. Transmittance dips correspond to photoluminescence peaks associated with the microcavity resonances.

From F. Ramiro-Manzano et al., Advanced Materials 23, 3022-3025 (2011), DOI 10.1002/adma.201100986. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA. Reused by the authors under Wiley's contributor reuse terms.

Two photonic barcodes with photoluminescence spectra and optical microscopy images of porous silicon microspheres
Figure 3. Photonic barcodes produced by two porous silicon microspheres, with their photoluminescence spectra and optical microscopy images in reflection and transmission.

From F. Ramiro-Manzano et al., Advanced Materials 23, 3022-3025 (2011), DOI 10.1002/adma.201100986. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA. Reused by the authors under Wiley's contributor reuse terms.

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