Optical switching in metallic photonic crystal slabs with photoaddressable polymers

Tunable Ultrafast Optical Switching via Waveguided Gold Nanowires

“…If we use A on (l) and A off (l) to denote the extinction spectrum for the pump switched on and off, respectively, we have A on ðlÞ ¼À log 10 T on and A off ðlÞ ¼À log 10 T off , where A off (l) corresponds to the steady-state optical extinction measurements. Thus, we can relate the TA measurements directly to the optical extinction data by A on ðlÞ ¼ A off ðlÞ À log 10 DT T ðlÞ þ 1 (2) and reconstruct the coupled-mode spectrum after strong excitation by pump pulses. Figure 3 shows a comparison between the optical extinction spectra before (blue curve) and after (red curve) excitation by pump pulses at an incident angle of u ¼ 168 and a time delay of t ¼ 200 fs, corresponding to the transient kinetics and spectrum in Figure 2.…”

“…Understanding the mechanisms and the evolution of particle plasmon resonances under different conditions is crucial for exploiting these properties in new optoelectronic devices. [1,2] Due to the extremely fast electronic dynamics and the ultrashort dephasing time of particle plasmons, [3,4] femtosecond pump-probe spectroscopy must be used to investigate the related photophysical process in the electron plasma oscillation. The optical-excitation-induced broadening and red-shift of the surface plasmon resonance in gold and silver nanoparticles in colloids or embedded in glass matrices have been studied previously.…”

Polariton bandstructure of disordered metallic photonic crystal slabs

“…Our results are interesting for improving possible future applications of MPCS on the one hand hand (see e.g. [22]), on the other hand they could give first hints to localization in our structures [2]. The limitations of this method are obvious for correlated longrange disorder: Due to the breakdown of the bandstructure, it is no longer possible to describe the system with a simple photonic band structure.…”

Single-Shot Fabrication of Waveguide Ternary Gratings with Narrow-Band Optical Response

“…5 Based on the coupling between the waveguide resonance mode and the particle plasmon resonance of gold nanostructures, a variety of polarizers and optical switches have been demonstrated. [6][7][8] Interference lithography using UV laser beams has been employed to write large-area grating structures into photoresist, which has been used as the master mask to fabricate metallic photonic crystals. 9 10 However, the flexible design of the interference-lithography scheme diversifies the possible patterns of the fabricated structures.…”