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dc.contributor.authorChalikkara, Farzeena
dc.contributor.authorSingha, Pradip
dc.contributor.authorVaranakkottu, Subramanyan Namboodiri
dc.date.accessioned2021-12-16T04:13:22Z
dc.date.available2021-12-16T04:13:22Z
dc.date.issued2019
dc.identifier.issn0924-4247
dc.identifier.doi10.1016/j.sna.2018.12.013
dc.identifier.urihttp://hdl.handle.net/10072/410918
dc.description.abstractOptical systems based on fluid-fluid interface are gaining great attention because they offer added advantages such as dynamic, reconfigurable, and self-healing capabilities with less complex fabrication steps compared to the solid based optical elements. Moreover, cost-effectiveness and ease of miniaturization pave a potential route towards the realization of portable optical and optofluidic devices. However, a single optofluidic device having remotely controlled multifunctional capabilities remains a challenge. We demonstrate an optofluidic multifunctional strategy, which could operate either as an optical switch or a tunable liquid lens. The principle relies on light-controlled volumetric change of an air plug confined in a minichannel filled with water. For the optical switch, volumetric change of the air plug modulates total internal reflection. A temperature difference of only 0.2 °C is sufficient for a subsecond switching time (0.6 ± 0.1 s). For the liquid lens, the change of plug size acts as an actuator to control the meniscus shape of the liquid. Upon heating or cooling, the meniscus develops a convex or a concave lens respectively. A temperature difference of 0.1–0.7 °C is sufficient for realizing tunability in the focal length. The demonstrated strategy is simple, cost-effective, non-contact and the device could be operated at room temperature.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherELSEVIER SCIENCE SA
dc.relation.ispartofpagefrom659
dc.relation.ispartofpageto665
dc.relation.ispartofjournalSensors and Actuators A: Physical
dc.relation.ispartofvolume285
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchMechanical engineering
dc.subject.fieldofresearchcode4016
dc.subject.fieldofresearchcode4017
dc.subject.keywordsScience & Technology
dc.subject.keywordsTechnology
dc.subject.keywordsEngineering, Electrical & Electronic
dc.subject.keywordsInstruments & Instrumentation
dc.subject.keywordsEngineering
dc.titleDual functional optofluidic platform based on light-actuated air plug
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationChalikkara, F; Singha, P; Varanakkottu, SN, Dual functional optofluidic platform based on light-actuated air plug, Sensors and Actuators A: Physical, 2019, 285, pp. 659-665
dc.date.updated2021-12-16T04:12:15Z
gro.hasfulltextNo Full Text
gro.griffith.authorSingha, Pradip


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