Retroemission by a glass bead monolayer for high-Sensitivity, long-Range imaging of upconverting phosphors

Bjørnar Sandnes; Tim A. Kelf; Hua Liu; Andrei V. Zvyagin

doi:10.1364/OL.36.003009

Retroemission by a glass bead monolayer for high-Sensitivity, long-Range imaging of upconverting phosphors

Bjørnar Sandnes, Tim A. Kelf, Hua Liu, Andrei V. Zvyagin^*

^*Corresponding author for this work

Macquarie University BioFocus Research Centre

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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Abstract

We introduce a retroemitter (REM) device comprising a planar glass bead set placed on a luminescent material substrate, which converges an excitation beam into a set of foci (voxels). The in-voxel emission is collimated by the beads, and propagates upstream over the long range, unlike the out-of-voxel emission spreading in all angles. The REM signal contrast is characterized as a function of incidence and observation angles and propagation distance. REM signal contrasts of approximately 20 and 1600 were found for the organic fluorescent dye and upconverting phosphor substrates, respectively. In the latter case, nonlinear optical signal enhancement plays a role in addition to the retroemission effect. This allows centimeter-scale REM patterns to be read out at the meter-scale distance using eye-safe sub-mW=cm² excitation intensities.

Original language	English
Pages (from-to)	3009-3011
Number of pages	3
Journal	Optics Letters
Volume	36
Issue number	15
DOIs	https://doi.org/10.1364/OL.36.003009
Publication status	Published - 1 Aug 2011

Bibliographical note

This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-36-15-3009]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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title = "Retroemission by a glass bead monolayer for high-Sensitivity, long-Range imaging of upconverting phosphors",

abstract = "We introduce a retroemitter (REM) device comprising a planar glass bead set placed on a luminescent material substrate, which converges an excitation beam into a set of foci (voxels). The in-voxel emission is collimated by the beads, and propagates upstream over the long range, unlike the out-of-voxel emission spreading in all angles. The REM signal contrast is characterized as a function of incidence and observation angles and propagation distance. REM signal contrasts of approximately 20 and 1600 were found for the organic fluorescent dye and upconverting phosphor substrates, respectively. In the latter case, nonlinear optical signal enhancement plays a role in addition to the retroemission effect. This allows centimeter-scale REM patterns to be read out at the meter-scale distance using eye-safe sub-mW=cm2 excitation intensities.",

author = "Bj{\o}rnar Sandnes and Kelf, {Tim A.} and Hua Liu and Zvyagin, {Andrei V.}",

note = "This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-36-15-3009]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

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AU - Sandnes, Bjørnar

AU - Kelf, Tim A.

AU - Liu, Hua

AU - Zvyagin, Andrei V.

N1 - This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-36-15-3009]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - We introduce a retroemitter (REM) device comprising a planar glass bead set placed on a luminescent material substrate, which converges an excitation beam into a set of foci (voxels). The in-voxel emission is collimated by the beads, and propagates upstream over the long range, unlike the out-of-voxel emission spreading in all angles. The REM signal contrast is characterized as a function of incidence and observation angles and propagation distance. REM signal contrasts of approximately 20 and 1600 were found for the organic fluorescent dye and upconverting phosphor substrates, respectively. In the latter case, nonlinear optical signal enhancement plays a role in addition to the retroemission effect. This allows centimeter-scale REM patterns to be read out at the meter-scale distance using eye-safe sub-mW=cm2 excitation intensities.

AB - We introduce a retroemitter (REM) device comprising a planar glass bead set placed on a luminescent material substrate, which converges an excitation beam into a set of foci (voxels). The in-voxel emission is collimated by the beads, and propagates upstream over the long range, unlike the out-of-voxel emission spreading in all angles. The REM signal contrast is characterized as a function of incidence and observation angles and propagation distance. REM signal contrasts of approximately 20 and 1600 were found for the organic fluorescent dye and upconverting phosphor substrates, respectively. In the latter case, nonlinear optical signal enhancement plays a role in addition to the retroemission effect. This allows centimeter-scale REM patterns to be read out at the meter-scale distance using eye-safe sub-mW=cm2 excitation intensities.

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JO - Optics Letters

JF - Optics Letters

IS - 15

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Retroemission by a glass bead monolayer for high-Sensitivity, long-Range imaging of upconverting phosphors

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