Gain-assisted hybrid-superlens hyperlens for nano imaging

Yao Ting Wang, Bo Han Cheng, You Zhe Ho, Yung Chiang Lan, Pi Gang Luan, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We propose an innovative active imaging device named gainassisted hybrid-superlens hyperlens and examine its resolving power theoretically. This semi-cylindrical device consists of a core of semicylindrical super-lens and a half cylindrical outer shell of hyperlens. Both the superlens and hyperlens parts of the device are appropriately designed multi-layered metal-dielectric structures having indefinite eigenvalues of dielectric tensors. The dielectric layers of the hyperlens are doped with Coumarin, which play the role of gain medium. The gain medium is analyzed thoroughly using a generic four-level system model, and the permittivity of the gain medium is extracted from this analysis for simulating the imaging characteristics of the device. According to our simulation at wavelength of 365 nm, an excellent resolution power much better than the diffraction limit value can be achieved.

Original languageEnglish
Pages (from-to)22953-22960
Number of pages8
JournalOptics Express
Issue number20
StatePublished - 24 Sep 2012


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