S.j. Juodkazis

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Spiral architecture photonic crystals have been fabricated in a negative-tone photoresist SU-8 by direct laser writing. These photonic crystals are self-supporting and highly-periodic, and exhibit photonic attenuation in the range of 1.7 to 5.0 µm..
This paper describes femtosecond laser lithography of 3-D photonic crystal templates in commercial photoresist SU-8 and replication of these templates with silicon. Using this approach, silicon-based photonic crystals having 3-D square spiral architecture and exhibiting photonic stop gaps near the 2.5- mum wavelength were fabricated. Possibilities to use a(More)
J. Trull,1 L. Maigyte,1 V. Mizeikis,2 M. Malinauskas,3 S. Juodkazis,4 C. Cojocaru,1 M. Rutkauskas,3 M. Peckus,3 V. Sirutkaitis,3 and K. Staliunas1,5 1Departament de Fı́sica i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Colom 11, E-08222 Terrassa, Barcelona, Spain 2Division of Global Research Leaders (Research Institute of Electronics),(More)
High quality three-dimensional micro-and nano-structures were fabricated in photoresist SU-8 by two-photon laser lithography. Extended periodic microstructures with so-called woodpile architecture are demonstrated to have good quality and exhibit fundamental and higher-order photonic stop-gaps in the infrared wavelength range of 2.0-8.0 µm. These SU-8(More)
Fabrication of metasurfaces by subtractive and additive (ablation and polymerisation) techniques are demonstrated using ultra-short laser pulses. Stokes polarimetry was used to determine optical retardance from laser structured regions on the surface and in the bulk. 3D laser writing/printing of optical elements and devices has to deliver precision of(More)
We simulate the spectral properties of simple plasmonic nanoparticles (NPs), which we have fabricated with electron beam lithography (EBL) and lift-off, with or without nano-grooves milled by ion-beam lithography (IBL). We estimate the NP behaviour under laser illumination using 3D finite difference time domain (FDTD) simulations, showing that simple(More)
Nano-textured surfaces on Si, Cu, and polystyrene (PS) substrates with feature sizes down to 10-20 nm fabricated over large areas by simple maskless plasma and chemical etching (Si and Cu, respectively) or thermally induced PS shrinking are compared for the surface enhanced Raman scattering (SERS) action. Plasma etching of Si wafers was used to create(More)
Photonic crystals (PCs), are famous due to their well-known temporal dispersion properties as well as recently discovered spatial dispersion properties, allowing to manage spatial propagation properties of light. The peculiarities of the spatial propagation in PCs consist in vanishing of diffraction (self-collimation [1,2], negative-refraction and(More)