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Here we show a method of color printing on nanoimprinted plasmonic metasurfaces [1] using laser post-writing. Laser pulses induce transient local heat generation that leads to melting and reshaping of the imprinted nanostructures [2]. This leads to melting and reshaping of the imprinted 20nm Al structures embedded in plastics. Depending on the laser pulse energy density, different surface morphologies...
Recently, we show a method of color printing on nanoimprinted plasmonic metasurfaces using laser post-writing. Laser pulses induce transient local heat generation that leads to melting and reshaping of the imprinted nanostructures [1]. Depending on the laser pulse energy density, different surface morphologies that support different plasmonic resonances can be created. This technology creates a laser...
A monolithic polymer optofluidic chip for manipulation of microbeads in flow is demonstrated. On this chip, polymer waveguides induced by Deep UV lithography are integrated with microfluidic channels. The optical propagation losses of the waveguides are measured to be 0.66±0.13dB/mm at a wavelength of λ=808nm. An optimized bead tracking algorithm is implemented, allowing for determination of the optical...
Dye based distributed feedback (DFB) lasers [1] have gained considerable interest as tunable lasers [2] and sensors, especially bio-sensors [3,4]. They are manufactured from low-cost commercially available materials and can exhibit narrow linewidths, broad spectral tuning ranges and high sensitivities. It has been shown that high refractive index layers significantly increase the tunability of DFB...
We report on an organic semiconductor distributed feedback laser with a continuously tunable wavelength from 621 to 657 nm on a single sample with thresholds as low as 38 μJ/cm2. Using laser interference lithography and reactive ion etching, we textured a glass substrate with a one-dimensional second-order Bragg surface grating. Optical confinement and gain is provided by a wedge-shaped layer of the...
Miniaturized optofluidic systems with integrated waveguides and microfluidic channels were built as monolithic polymer devices. Their potential for biosensor applications was demonstrated by two examples: (1) Change of the light attenuation as function of the analytepsilas refractive index, (2) Channels functionalized by Dip-Pen Nanolithography allowed the selective capture of fluorescent markers,...
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