Holograms in algal suspensions

Photorefractive crystals can record holograms in the form of phase gratings arising from their response to an interference pattern. Absorption of light produces a local electric field which modifies the refractive index via the Pockels effect. Algae exhibiting photo-induced taxis (movement in respon...

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Published inNature (London) Vol. 369; no. 6478; pp. 282 - 283
Main Authors Brown, K. M, Lamb, K, Russell, D, Ruddock, I. S, Cunningham, A, Illingworth, R
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group 26.05.1994
Subjects
Dunaliella primolecta
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Summary:Photorefractive crystals can record holograms in the form of phase gratings arising from their response to an interference pattern. Absorption of light produces a local electric field which modifies the refractive index via the Pockels effect. Algae exhibiting photo-induced taxis (movement in response to a light stimulus) can be thought of as behaving in an analogous manner, except that by their presence or absence they change the local transmission of a sample, instead of its refractive index. We report here the recording of an optical grating in a suspension of algae Dunaliella primolecta and the subsequent reconstruction of a simple hologram.
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ISSN:0028-0836
1476-4687
DOI:10.1038/369282b0