The paper brings new concept and useful technique, how to modify optical properties of different optical and optoelectronical devices by application of three dimensional (3D) photonic crystal structures made of polymer in the surface of photonic devices. This paper is focused on the design, fabrication and characterization of 3D woodpile structures based on IP-Dip polymer for application on photonic devices. The woodpile structures with period 500 nm was designed, simulated and fabricated for direct application on photonic devices by 3D laser lithography. The proposed photonic band gap was characterized from transmission measurement.
In this paper, we present new technique for modification of diffraction properties of light emitting devices by direct surface application of three-dimensional (3D) woodpile photonic crystal structure. For fabrication of woodpile structure, a commercial direct laser writing system Photonic Professional GT from Nanoscribe GmbH was used. This 3D laser lithography system is based on nonlinear two-photon absorption in liquid IP-Dip negative photosensitive polymer. Quality of prepared structure was analyzed using scanning electron microscope. The diffraction patterns of fabricated woodpile structure were measured using monochromatic light emitting diode and laser sources. After surface application on the output of the optical fiber, we investigated angular diffraction by goniophotometer.
In this paper we present modification of angular photoresponse of InGaAsN-based photodiode with applied polymer (IPDIP) three-dimensional (3D) woodpile structure. 3D woodpile structure was prepared as effective diffractive element for using in optoelectronic devices with possibility of direct application on a chip surface. 3D woodpile structure was prepared using laser lithography by direct laser writing process. The effect of woodpile structure on angular photoresponse structure was investigated from goniophotometer measurements. Spatial modulation of light coupling into the photodiode chip with applied 3D woodpile structure was documented for irradiation by broad-band green light.
In this paper we proposed new concept for fabrication of 3D polymer waveguides with surface Bragg grating (SBG). For the structures fabrication we used 3D laser lithography based on direct laser writing process with nonlinear two-photon absorption in photosensitive material. High-resolution negative IP-Dip photoresist for the structure fabrication was used. The 3D photonic structure consists of supporting structure and waveguide with SBG. To improve the light guiding properties, waveguide part was isolated from the supporting structure by thin polymer pillars. The SBG parameters were numerically proposed by transfer matrix method to reflect narrow spectral band at 1.55 μm wavelength. Design of the proposed structure is suitable as a sensor for on-chip application for measurement of temperature or refractive index. Reflection characteristics of the SBG waveguide were measured with direct edge optical fiber coupling by optical spectrum analyzer. Quality of prepared structure was investigated by scanning electron microscope.
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