Printing:Thisposteris48”wideby36”high.It’sdesignedtobeprintedonalarge-formatprinter.

CustomizingtheContent:Theplaceholdersinthisposterareformattedforyou.Typeintheplaceholderstoaddtext,orclickanicontoaddatable,chart,SmartArtgraphic,pictureormultimediafile.Toaddorremovebulletpointsfromtext,justclicktheBulletsbuttonontheHometab.Ifyouneedmoreplaceholdersfortitles,contentorbodytext,justmakeacopyofwhatyouneedanddragitintoplace.PowerPoint’sSmartGuideswillhelpyoualignitwitheverythingelse.Wanttouseyourownpicturesinsteadofours?Noproblem!Justright-clickapictureandchooseChangePicture.Maintaintheproportionofpicturesasyouresizebydraggingacorner.

ApplicationofSnell’sLawonOpticalCloakingBy: MIDN 4/C Peralta, 4/C Lockhart, 4/C Caron

ABSTRACT

Continueanexperimentwhichusesopticalspatialcloakingtohideanobjectbehindtwoseparatecontainersofwater.

BACKGROUND

OpticalSpatialCloakingisbasedontheideathatlightistransverselyshiftedthroughatiltedmediumandthenrefractedbacktodisplayaseparateimagefromtheonebeinghidden.

FollowingSnell’slaw:n1sin(θ1)=n2sin(θ2)Thecloakingwidth(2*d)canbeincreasedbyincreasingn2.

ACKNOWLEDGEMENTS

METHODS

Twoequalcontainersofwaterfilledwithequalvolumesofwaterwereused,alongwithalaserlightsource,andanobjectwhichwasusedtoshowthe‘cloakingregion’.

Thecloakingregionwascreatedbytheindexofrefractionofthematerialinsidethecontainers.Thematerialusedinthefirsttrail(Trial1)waswaterwhichhasanindexofrefractionofapproximately1.33.

Thesecondandthirdtrialwasusinga30%and80%solutionofsugar-waterrespectivelyinordertochangetheindexofrefraction.

Measurementsonthemaximumcloakingwidthwastakenbysplittingabeamoncorneroftheapparatusandmeasuringtheseperationbetweentheresultingbeams.

CONCLUSION

Thefutureofthisprojectliesintryingtomaximizethecloakedareawhileminimizingthesizeofthecloakingapparatus.Thiscanbedonebyfindingamaterialfortheappartuswithahigherindexofrefraction,orbyalteringtheangleoftheapparatustocreatealongerpath.

REFERENCES

J.C.Howell,J.B.Howell,andJ.S.Choi,“Amplitude-only,passive,broadband,opticalspatialcloakingofverylargeobjects,”AppliedOptics,(2014).

RESULTS

Lightwasdiffractedtoshowimagebehindthesecondcontainer.

Themaximumcloakingdistancewasapproximately10.75centimetersacrossusingapurewatersolutionof1.33indexofrefraction,11cmand11.5cmwithsubsequentadditionsofcupsofsugartodemonstratehowchangingtheindexofrefractionincreasesthecloakingwidththroughtheapplicationofSnell’slaw.