Publication:
Metal-gas interaction studies using whispering gallery modes

dc.contributor.departmentDepartment of Physics
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.departmentKUTTAM (Koç University Research Center for Translational Medicine)
dc.contributor.kuauthorBavili, Nima
dc.contributor.kuauthorKiraz, Alper
dc.contributor.kuauthorMorova, Berna
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-09T22:53:51Z
dc.date.issued2021
dc.description.abstractIn this work, in addition to the sensor application of coated optical microresonator, we show the phase transition of Pd-H system using WGMs. WGMs are propagating on a cylindrical microresonator which is based on a single mode optical fiber coated with a desired metal thickness and desired morphology. Light coupling is achieved by tapered fiber connected to a tunable laser working in the infrared wavelength. WGMs are observed and tracked by transmitted laser light. The sensor consisting of the resonator and a tapered fiber is placed in a metal chamber that is connected to the gas tanks. Desired concentration of the gas is achieved by mixing the carrier gas (nitrogen) and hydrogen. By increasing or decreasing of the hydrogen concentration in the sensing chamber, palladium layer expands or contracts. The change in the radius of the resonator translates in to shifts in spectral positions of the WGMs. However, these expansion or contractions rates are different for different phases of the Pd - H system. For instance, solid solution of hydrogen in palladium, represented by alpha has the lowest expansion or contraction. In contrast beta phase has the highest rate. These phase transitions and intermediate phase are shown using the WGMs.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.volume11354
dc.identifier.doi10.1117/12.2555786
dc.identifier.eissn1996-756X
dc.identifier.isbn978-1-5106-3481-7
dc.identifier.issn0277-786X
dc.identifier.scopus2-s2.0-85090397195
dc.identifier.urihttps://doi.org/10.1117/12.2555786
dc.identifier.urihttps://hdl.handle.net/20.500.14288/7268
dc.identifier.wos672621800027
dc.keywordsWhispering gallery modes
dc.keywordsMicroresonator
dc.keywordsPalladium nanosurface
dc.keywordsOptical sensor
dc.language.isoeng
dc.publisherSpie-Int Soc Optical Engineering
dc.relation.ispartofOptical Sensing And Detection Vi
dc.subjectOptics
dc.titleMetal-gas interaction studies using whispering gallery modes
dc.typeConference Proceeding
dspace.entity.typePublication
local.contributor.kuauthorBavili, Nima
local.contributor.kuauthorMorova, Berna
local.contributor.kuauthorKiraz, Alper
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Physics
local.publication.orgunit2KUTTAM (Koç University Research Center for Translational Medicine)
local.publication.orgunit2Graduate School of Sciences and Engineering
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