Novel method for fabrication of volume 2D photonic crystals

Ryszard Buczynski; Ireneusz Kujawa; Adam Filipkowski; Dariusz Pysz; Florian Hudelist; Andrew Waddie; Ryszard Stepien; Mo Taghizadeh

doi:10.1117/12.783611

21 April 2008 Novel method for fabrication of volume 2D photonic crystals

Ryszard Buczynski, Ireneusz Kujawa, Adam Filipkowski, Dariusz Pysz, Florian Hudelist, Andrew Waddie, Ryszard Stepien, Mo Taghizadeh

Author Affiliations +

Proceedings Volume 6989, Photonic Crystal Materials and Devices VIII; 698904 (2008) https://doi.org/10.1117/12.783611
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

Photonic crystals are wavelength-scale periodic structures built from dielectrics with different refractive indexes As standard 2D photonic crystals are fabricated by lithographic methods, but in this case only planar structure can be obtained. We have adapted stack and draw technique that is usually used for photonic crystal fiber fabrication to develop volume 2D photonic crystals. Technology allows fabrication of high contrast structures with air holes as well as low contrast solid-all structures where air holes are replaced with glass micro rods of refractive index. Use of soft glasses with a high difference in refractive index allows development of a structure where partial photonic band gap exists. The proposed method offers possibility of fabrication volume 2D photonic crystal with a diameter in the order of 1 mm and height of a few mm. Large area photonic crystals are very attractive as new optical material named 'photonic glass' with built-in photonic bandgap functionality. Preliminary fabrication test were performed for two pairs of soft glasses NC21/F2 and SK222/Zr3. The considered glasses are thermally matched and are synthesized in-house except of F2 glass (standard Schott glass). Obtained structures are regular with some defects on the borders between intermediate performs. Some glass diffusion is observed between Zr3 and SK222 glasses. With this technique a 2D photonic crystal with a hexagonal lattice was fabricated with a pair of soft glasses SK222 and Zr3. Microrod diameter is 749nm and lattice constant 1110 nm. Photonic crystal consists of 166421 elements (425 elements on diagonal) and its total surface is about field ~0,178mm2.

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Ryszard Buczynski, Ireneusz Kujawa, Adam Filipkowski, Dariusz Pysz, Florian Hudelist, Andrew Waddie, Ryszard Stepien, and Mo Taghizadeh "Novel method for fabrication of volume 2D photonic crystals", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 698904 (21 April 2008); https://doi.org/10.1117/12.783611

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KEYWORDS

Glasses

Photonic crystals

Refractive index

Neodymium

Crystals

Diffusion

Fabrication

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