Controllable near-field intensity and spot size of hybrid terahertz metamaterial

Dejia Meng, M. N.F. Hoque, Wei Wang, Zhaoyang Fan, Kejia Wang, Jianjun Lai, Changhong Chen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We report controllable near fields around split-ring resonator (SRR) gaps of an active terahertz metamaterial. As extension of parallel-plate capacitors, patterned VO2 is integrated into the metallic SRRs to manipulate the nearfield intensity and hot spot size through its metal-insulator transition. This design enhances the device reliability by preventing VO2 dielectric breakdown at a strongly enhanced near field. The near-field intensity and spot size are tunable in broad ranges, and the device is demonstrated to be capable of compensating resonant frequency drift arisen from different interactions due to near-field coupling. It provides an effective method to actively manipulate the lightmatter interaction through the strongly enhanced and tunable near fields.

Original languageEnglish
Pages (from-to)1745-1748
Number of pages4
JournalOptics Letters
Issue number8
StatePublished - 2015


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