Special Section on Nanophotonic Materials and Devices

Chirped axisymmetric photonic microstructures for spatial filtering

[+] Author Affiliations
Darius Gailevicius

Vilnius University, Laser Research Center, Department of Quantum Electronics, Saulėtekio Avenue 10, Vilnius LT-10222, Lithuania

Vytautas Purlys

Vilnius University, Laser Research Center, Department of Quantum Electronics, Saulėtekio Avenue 10, Vilnius LT-10222, Lithuania

Lina Maigyte

Universitat Politècnica de Catalunya, Departament de Física i Enginyeria Nuclear, Colom 11, Terrassa 08222, Spain

Martynas Peckus

Vilnius University, Laser Research Center, Department of Quantum Electronics, Saulėtekio Avenue 10, Vilnius LT-10222, Lithuania

Kestutis Staliunas

Universitat Politècnica de Catalunya, Departament de Física i Enginyeria Nuclear, Colom 11, Terrassa 08222, Spain

Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys, 23, Barcelona 08010, Spain

J. Nanophoton. 8(1), 084094 (Jul 23, 2014). doi:10.1117/1.JNP.8.084094
History: Received March 31, 2014; Revised June 18, 2014; Accepted June 23, 2014
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Abstract.  We explore, theoretically and experimentally, the spatial (angular) filtering of two-dimensional light beams by longitudinally chirped axisymmetric photonic microstructures. The structures comprise a set of planes of concentric rings with the separation between the plates smoothly varying along the propagation direction. Axisymmetric structures were recorded in a bulk of glass, in which the refractive index has been modulated using tightly focused femtosecond laser pulses. We show that the spatial filtering recently shown in nonchirped axisymmetric structures can be substantially improved by the chirp: the angular range of filtering was increased approximately two times. The numerical study reveals that the filtering efficiency can be strongly increased using the longer and larger index contrast axisymmetric photonic structures.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Darius Gailevicius ; Vytautas Purlys ; Lina Maigyte ; Martynas Peckus and Kestutis Staliunas
"Chirped axisymmetric photonic microstructures for spatial filtering", J. Nanophoton. 8(1), 084094 (Jul 23, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.084094


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