Plasmonic microcavity formed by the Möbius strip<xref rid="cpb_26_3_037303fn1" ref-type="fn">*</xref><fn id="cpb_26_3_037303fn1"><label>*</label><p>Projected supported by the National Natural Science Foundation of China (Grant Nos. 61271030 and 61308041) and the Fundamental Research Funds for the Central Universities of China (Grant No. ZYGX2014J043).</p></fn>

Plasmonic microcavity formed by the Möbius strip**

Projected supported by the National Natural Science Foundation of China (Grant Nos. 61271030 and 61308041) and the Fundamental Research Funds for the Central Universities of China (Grant No. ZYGX2014J043).

Zeng Yang^†, Wang Zhi-Yong, Wu Yuan, Lu Lan-Song, Wang Yun-Xiang, Shi Shuang-Jin, Qiu Qi

(color online) Diagram of spatial separation. In this local area, the obstacle (here which is metal) separates space into two sides (colored in blue), neither of which is capable of contacting the other side directly. Attributed to the single-surface property of the Möbius strip, surface waves can reach the opposite side and indirect tuning is achievable.