Axicon-shape photonic crystals and limited-diffraction light propagation

Hamza Kurt

doi:10.1117/12.822246

26 May 2009 Axicon-shape photonic crystals and limited-diffraction light propagation

Hamza Kurt

Proceedings Volume 7366, Photonic Materials, Devices, and Applications III; 73661C (2009) https://doi.org/10.1117/12.822246
Event: SPIE Europe Microtechnologies for the New Millennium, 2009, Dresden, Germany

Abstract

Electromagnetic beams are subject to spatial spreading as they propagate. We have investigated the light propagation passing through a finite-aperture which is obtained by the two-dimensional square-lattice photonic crystals. It is observed that the beam that is coupled to the free-space by exiting the axicon-shape photonic crystal resists considerably against the diffraction. The inspection of the beam profile in the transverse to the propagation direction reveals the appearance of the side-lobes and we attributed the limited-diffraction beam propagation to these artificially created lobes. We show that an order of magnitude improvement for beating the diffraction length is achievable with axiconshape photonic crystal. The advantages of the presented photonic crystal based axicon over the bulk refractive axicons are the compactness and the integrated nature of the former one in addition to the flexibility of engineering individual unit cells of photonic crystal structure.

Citation Download Citation

Hamza Kurt "Axicon-shape photonic crystals and limited-diffraction light propagation", Proc. SPIE 7366, Photonic Materials, Devices, and Applications III, 73661C (26 May 2009); https://doi.org/10.1117/12.822246

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