Electromagnetic energy vortex associated with sub-wavelength plasmonic Taiji marks

Wei Ting Chen, Pin Chieh Wu, Chen Jung Chen, Hung Yi Chung, Yuan Fong Chau, Chieh Hsiung Kuan, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


The Taiji symbol is a very old schematic representation of two opposing but complementary patterns in oriental civilization. Using electron beam lithography, we fabricated an array of 70 × 70 gold Taiji marks with 30nm thickness and a total area of 50 × 50 μm2 on a fused silica substrate. The diameter of each Taiji mark is 500nm, while the period of the array is 700nm. Here we present experimental as well as numerical simulation results pertaining to plasmonic resonances of several Taiji nano-structures under normal illumination. We have identified a Taiji structure with a particularly interesting vortex-like Poynting vector profile, which could be attributed to the special shape and dimensions of the Taiji symbol.

Original languageEnglish
Pages (from-to)19665-19671
Number of pages7
JournalOptics Express
Issue number19
Publication statusPublished - 2010 Sept 13

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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