Efficient transportation of nano-sized particles along slotted photonic crystal waveguide

Pin Tso Lin*, Po-Tsung Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We design a slotted photonic crystal waveguide (S-PhCW) and numerically propose that it can efficiently transport polystyrene particle with diameter as small as 50 nm in a 100 nm slot. Excellent optical confinement and slow light effect provided by the photonic crystal structure greatly enhance the optical force exerted on the particle. The S-PhCW can thus transport the particle with optical propulsion force as strong as 5.3 pN/W, which is over 10 times stronger than that generated by the slotted strip waveguide (S-SW). In addition, the vertical optical attraction force induced in the S-PhCW is over 2 times stronger than that of the S-SW. Therefore, the S-PhCW transports particles not only efficiently but also stably. We anticipate this waveguide structure will be beneficial for the future lab-on-chip development

Original languageEnglish
Pages (from-to)3192-3199
Number of pages8
JournalOptics Express
Issue number3
StatePublished - 30 Jan 2012

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