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Iam-Choon Khoo
Researcher at Pennsylvania State University
Publications - 334
Citations - 10222
Iam-Choon Khoo is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Liquid crystal & Laser. The author has an hindex of 49, co-authored 330 publications receiving 9601 citations. Previous affiliations of Iam-Choon Khoo include Wayne State University & Foundation University, Islamabad.
Papers
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Liquid crystal clad near-infrared metamaterials with tunable negative-zero-positive refractive indices
TL;DR: Numerical results show that the index of refraction for the proposed structure can be changed over the range from ?
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Nanosphere dispersed liquid crystals for tunable negative-zero-positive index of refraction in the optical and terahertz regimes
TL;DR: An analysis of aligned nematic liquid crystal cells containing core-shell nanospheres shows that it is possible to devise a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values.
Journal ArticleDOI
Holographic grating formation in dye- and fullerene C(60)-doped nematic liquid-crystal film.
TL;DR: Transient and persistent holographic gratings have been observed in dye- and fullerene C(60)-doped nematic liquid-crystal films and the nature and time evolution of the underlying mechanisms, such as space-charge field production, flows, and dielectric- and conductivity-induced torques are examined.
Journal ArticleDOI
Tunable Frequency Selective Surfaces and Negative-Zero-Positive Index Metamaterials Based on Liquid Crystals
Jeremy A. Bossard,X. Liang,Ling Li,Seokho Yun,Douglas H. Werner,Brian Weiner,Theresa S. Mayer,P.F. Cristman,A. Diaz,Iam-Choon Khoo +9 more
TL;DR: In this article, the properties of aligned nematic liquid crystal (LC) cells were utilized in the design of a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values.
Posted Content
Tunable magnetic response of metamaterials
Shumin Xiao,Uday K. Chettiar,Alexander V. Kildishev,Vladimir P. Drachev,Iam-Choon Khoo,Vladimir M. Shalaev +5 more
TL;DR: In this article, a thermally tunable optical metamaterial with negative permeability working in the visible range was demonstrated, by covering coupled metallic nanostrips with aligned nematic liquid crystals (NLCs).