Two-Dimensional Hybrid Photonic Crystal With Graded Low-Index Using a Nonuniform Voltage.
We proposed a new method for designing graded index lens using liquid crystal infiltration into annular photonic crystals. Applying an external nonuniform voltage in the transverse direction perpendicular to the direction of light propagation yields different orientation of liquid crystal molecules...
| Publicado en: | Zeitschrift für Naturforschung Section A: A Journal of Physical Sciences Vol. 75; no. 1; pp. 65 - 72 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
De Gruyter
Jan2020
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=140960039&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 140960039 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 09320784 FL07 jtl: Zeitschrift für Naturforschung Section A: A Journal of Physical Sciences issn: 09320784 maglogo: N pubinfo: dt: Jan2020 vid: 75 iid: 1 pid: 1734 pub: De Gruyter artinfo: ui: 140960039 10.1515/zna-2019-0144 ppf: 65 ppct: 7 formats: tig: atl: Two-Dimensional Hybrid Photonic Crystal With Graded Low-Index Using a Nonuniform Voltage. aug: au: Rezaei, Behrooz Giden, Ibrahim Halil Zakerhamidi, Mohammad Sadegh Ranjkesh, Amid Yoon, Tae-Hoon affil: Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran Department of Electrical and Electronics Engineering, TOBB University of Economics and Technology, Ankara 06560, Turkey Department of Electronics Engineering, Pusan National University, Busan, 46241, South Korea su: Photonic crystals Finite difference time domain method Light propagation Optical devices Plane wavefronts Liquid crystals Electro-optical effects sug: subj: Photonic crystals Finite difference time domain method Light propagation Optical devices Plane wavefronts Liquid crystals Electro-optical effects keyword: Focal Distance Tuning Graded Index Optics Liquid Crystal Optical Beam Focusing Photonic Crystal ab: We proposed a new method for designing graded index lens using liquid crystal infiltration into annular photonic crystals. Applying an external nonuniform voltage in the transverse direction perpendicular to the direction of light propagation yields different orientation of liquid crystal molecules inside the photonic crystal unit cells. As a result, a gradient refractive index was modulated. We numerically investigate focusing properties of the designed graded index structure using plane-wave expansion and finite-difference time-domain methods. The gradient refractive index profile was adjusted by varying the nonuniform voltage excitations, which consequently altered the focal distance of the graded index structure. A wide tuning range of 1856 nm was achieved for focal distance by the proposed graded index structure. This feature can be implemented for planning a flat lens with tunable focal distance based on electro-optic effect. These achievements may have future applications in some optical devices such as near-field imaging and scanning. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2020 holdings: @attributes: islocal: N |
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