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Mechanical Transfer of Optically Trapped Nanoparticle
KTH, School of Electrical Engineering (EES).
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this project, a mechanical system for transferring a silica nanoparticle is designedand implemented. This system is based on a mobile optical trap which enables 3Dmanipulation of a nanoparticle in high vacuum condition. The silica nanoparticle withdiameter 177nm is trapped at ambient pressure in first chamber called loading chamberat wavelength 1565nm. Then the pressure of loading chamber is reduced by vacuumpump to 10−5−10−6mbar. The second chamber is always kept in high vacuum. There isa vacuum valve between two chambers which isolates them from each other. As we openthe valve, the pressure inside the both chambers would be equilibrated. The trappednanoparticle is transferred to the second chamber with the distance around 20-25cm inless than 20-30 seconds with macroscopic scale resolution. During this long range transfer,we are able to perform microscopic transfer due to the presence of three nanopositionersaligned with three axes. No feedback system is used to stabilize particle motion for lowerpressure.

Abstract [sv]

I detta master examensarbete ett mekaniskt system för överflyttning av en kiselnanopartikelär utformad och implementerad. Detta system bygger på en mobil optisk fälla sommöjliggör 3D manipulering av en nanopartikel i högt vakuumtillstånd. Kiselnanopartikelmed 177nm diameter fångas vid omgivningsryck och vid våglängden 1565nm i förstakammaren såkallad laddningskammaren. Sedan reduceras trycket i laddningskammarenmed vakuumpump till 10−5−10−6mbar. Den andra kammaren hålls alltid i högvakuum.I syfte att isolera dessa tvåkammare ifrån varandra finns det en vakuumventil emellankammarna. När ventilen öppnas trycket inne i båda kamrarna hålls i jämvikt ochden fångade nanopartikel överförs till den andra kammaren på en avståndet runt 20-25cm, på mindre än 20-30 sekunder med makroskopisk skala upplösning. Under dennalånga överföringsintervall, har vi möjlighet att utföra mikroskopisk överföring pågrundav närvaron av tre nanopositioners inriktade med tre axlar. Inget återkopplingssystem används för att stabilisera partikelrörelse för lägre tryck.

Place, publisher, year, edition, pages
2016.
Series
TRITA-EE, ISSN 1653-5146 ; 2016:191
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-200901OAI: oai:DiVA.org:kth-200901DiVA, id: diva2:1071202
Available from: 2017-02-06 Created: 2017-02-03 Last updated: 2017-02-06Bibliographically approved

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