Recently metallic two and three dimensional photonic crystals ͑PCs͒ have been studied with the focus on using such structures in incandescent lighting and thermal photovoltaic applications. They exhibit a metallic band gap for low frequencies as well as structural band gaps. Especially the metallic band gap allows to block the infrared transmission… (More)
This paper discusses the fundamentals, applications, potential, limitations, and future perspectives of polarized light reflection techniques for the characterization of materials and related systems and devices at the nanoscale. These techniques include spectroscopic ellipsometry, polarimetry, and reflectance anisotropy. We give an overview of the various… (More)
Ellipsometric measurements in a wide spectral range (from 0.05 to 6.5 eV) have been carried out on the organic semiconducting polymer,
We present an all-optical switch based on joint effects of dipole induced transparency (DIT) and electromagnetic induced transparency (EIT), that forbids the transparency induced by a dipole in an add-drop filter due to the vacuum Rabi shifting. The switching speed is very high, since only quantum interference between probe and pump signals is involved.
Electron-phonon interactions of free charge-carriers in doped pi-conjugated polymers are conceptually described by 1-dimensional (1D) delocalization. Thereby, polaronic transitions fit the 1D-Froehlich model in quasi-confined chains. However, recent developments in conjugated polymers have diversified the backbones to become elaborate heterocylcic… (More)
In this work we report on the technology for enabling the mass replication of custom-designed and e-beam lithographically prepared structures via establishing UV-NIL nanoimprint processes for pattern transfer into UV curable pre-polymers. The new nano-fabrication technology based on the concept of disposal master technology (DMT) is suitable for mass volume… (More)
In the last two decades photonic crystals (PC) have been studied in one, two and three dimensions. Recently metallic two and three dimensional PCs were investigated with the focus on using such structures in incandescent lightning and thermal photovoltaic applications. These structures exhibit a metallic band gap below a certain threshold frequency as well… (More)