Materials, Photonic Devices, and Sensors

Design of electro-optic photonic crystal structure for subdiffraction imaging over the entire visible wavelength range

[+] Author Affiliations
Rajib Ghosh

University of Calcutta, Department of Applied Optics and Photonics, JD-2, Sector-III, Salt Lake, Kolkata-700 098, India

Institute of Engineering and Management, Department of Electronics and Communication Engineering, Y-12, Sector-V, Salt Lake, Kolkata-700 091, India

K. K. Ghosh

Institute of Engineering and Management, Department of Electronics and Communication Engineering, Y-12, Sector-V, Salt Lake, Kolkata-700 091, India

Rajib Chakraborty

University of Calcutta, Department of Applied Optics and Photonics, JD-2, Sector-III, Salt Lake, Kolkata-700 098, India

Opt. Eng. 55(12), 127101 (Dec 07, 2016). doi:10.1117/1.OE.55.12.127101
History: Received August 22, 2016; Accepted November 8, 2016
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Abstract.  A photonic crystal (PhC)-based structure is designed to achieve subdiffraction imaging over the entire visible wavelength range. The designed structure is a two-dimensional triangular lattice PhC formed by making circular holes in a 100-nm film of electro-optic lithium niobate (LiNbO3) grown on indium tin oxide. The analysis is done by using MEEP and MPB softwares. This shows that by applying a voltage within ±460  V, equal frequency contour can be obtained for specific values of frequencies, which corresponds to wavelength (λ) in visible range (389 to 757 nm). This indicates that the designed structure will have effective negative refraction and hence subdiffraction imaging over the entire visible wavelength (frequency) range. By placing this type of PhC structure in front of the objective, the resolution of the conventional imaging system can be increased.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Rajib Ghosh ; K. K. Ghosh and Rajib Chakraborty
"Design of electro-optic photonic crystal structure for subdiffraction imaging over the entire visible wavelength range", Opt. Eng. 55(12), 127101 (Dec 07, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.127101


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