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Optically Nonlinear Bragg Diffracting Nanosecond Optical Switches
Abstract
Monodisperse, highly charged colloidal particles in low ionic strength solutions self-assemble into bcc or fcc crystalline colloidal arrays (CCAs) due to interparticle repulsive interactions. We demonstrate that a CCA of dyed particles embedded in a poly acrylamide hydrogel acts as a nanosecond optical Bragg diffraction switching device. Under low light intensities the CCA is refractive index matched to the medium and does not diffract. However, high intensity excitation within the dye absorption band heats the spheres within nanoseconds to decrease their refractive index. The array ``pops up'' to diffract light within 2.5 ns. These intelligent CCA hydrogels may have applications in optical limiting, computing, and nanosecond fast optical switching devices, etc.
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Cites
Introduction to Physical Polymer Science
Sperling, L. H. (2005) · doi:10.1002/0471757128 · Cited by 2,917
Cited by
Self‐Assembled Photonic Structures
Galisteo‐López, J. F., Ibisate, M., Sapienza, R., Froufe‐Pérez, L. S., Blanco, Á., & López, C. (2011) · Advanced Materials · doi:10.1002/adma.201000356 · Cited by 668
Cai, Z., Li, Z., Ravaine, S., He, M., Song, Y., Yin, Y., Zheng, H., Teng, J., & Zhang, A. (2021) · Chemical Society Reviews · doi:10.1039/d0cs00706d · Cited by 542
Optical tweezer arrays and optical substrates created with diffractive optics
Dufresne, E. R., & Grier, D. G. (1998) · Review of Scientific Instruments · doi:10.1063/1.1148883 · Cited by 532
Tunable Inverse Opal Hydrogel pH Sensors
Lee, Y. ‐., & Braun, P. V. (2003) · Advanced Materials · doi:10.1002/adma.200304588 · Cited by 526
Bertone, J. F., Jiang, P., Hwang, K. S., Mittleman, D. M., & Colvin, V. L. (1999) · Physical Review Letters · doi:10.1103/physrevlett.83.300 · Cited by 323
Metadata
- Authors
- Pan, G., Kesavamoorthy, R., & Asher, S. A.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1997-05-19
- Volume
- 78
- Issue
- 20
- Pages
- 3860-3863
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2025229181
- Cited by
- 172
- References
- 1
- FWCI
- 5.26
- Type
- journal article
- Language
- en
- Open access
- closed
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- Pan, G., Kesavamoorthy, R., & Asher, S. A. (1997). Optically Nonlinear Bragg Diffracting Nanosecond Optical Switches. Physical Review Letters. https://doi.org/10.1103/physrevlett.78.3860
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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