Georg Baselitz : Pastels, Watercolors, Drawings

Dahlem writes a letter to German artist Baselitz on the topic of drawing and his viewing of the artist's early work across his career

Eleven-channel second-order silicon microring-resonator filterbank with tunable channel spacing

A wide-band, eleven-channel second-order filterbank fabricated on an SOI platform is demonstrated with tunable channel spacing and a 20 GHz single-channel bandwidth. The tuning efficiency is ~28 μW/GHz/ring

Dynamical systems in nanophotonics: From energy efficient modulators to light forces and optomechanics

We demonstrate novel device concepts based on rigorous design of the dynamics of resonant nanophotonic systems, such as dispersionless resonant switches and energy-efficient mo-dulator architectures, slow-light cells, and nanomechanical photonic devices based on light forces

Experimental demonstration of loopcoupled microring resonators for optimally sharp optical filters

Abstract: We present the first experimental demonstration of recently proposed loop-coupled resonator device concepts, with characteristic transmission zeros, enabling optimally sharp passbands for channel add-drop filter applications. Fourth-order SiN-core and Si-core strongconfinement microring-resonator designs are described. Microphotonic circuits have enabled the integrated implementation of flat-top, high-order coupled-cavity filters [1], analogous to thin-film filters available in bulk optics, suitable for chip-scale wavelength routing applications In this paper, we show the first experimental demonstration of loop-coupled resonators, designed to provide an optimally sharp 4 th -order add-drop filter, including the confirmation of transmission null interference mediated by the LCP. Two designs are used: a static microring filter in Si-rich SiN, and a thermally tunable Si microring filter. a2917_1.pd

Photonic integration in a commercial scaled bulk-CMOS process

We demonstrate the first photonic chip designed for a commercial bulk CMOS process (65 nm-node) using standard process layers combined with post-processing, enabling dense photonic integration with high-performance microprocessor electronics.Texas Instruments IncorporatedUnited States. Defense Advanced Research Projects Agenc