71 citations · 342 across the 16 of their papers we have counts for
16 papers
Pulse Compression by an Optical Push Broom On a Chip
Boyi Zhang, Maurice Pfeiffer, Mahmoud A. Gaafar +5
In this study, we report a first experimental demonstration of pulse compression by a gradual refractive index front moving in a periodically modulated silicon waveguide, the so-ca…
10 dB emission suppression in a structured low index medium
Soumyadeep Saha, Meraj E Mustafa, Manfred Eich +1
Significant suppression of radiation in 3D structured media with small refractive index 1.4-1.6, such as of glass or polymers, is a desirable feature yet to be obtained. For period…
Fourier optics with linearly tapered waveguides: light trapping and focusing
Mahmoud A. Gaafar, Hagen Renner, Manfred Eich +1
An optical pulse asymptotically reaching zero group velocity in tapered waveguides can ultimately stop at a certain position in the taper accompanied by a strong spatial compressio…
Optical Push Broom On a Chip
Mahmoud A. Gaafar, He Li, Xinlun Cai +3
Here we report the first experimental demonstration of light trapping by a refractive index front in a silicon waveguide, the optical push broom effect. The front generated by a fa…
The limits for complete photonic bandgaps in low-contrast media
Lukas Maiwald, Timo Sommer, Marvin Schulz +2
The minimal refractive index contrast to obtain a complete photonic bandgap (CPBG) in structured media was not identified so far. We address this problem by considering distributed…
Linear Schrödinger equation with temporal evolution for front induced transitions
Mahmoud A. Gaafar, Hagen Renner, Alexander Y. Petrov +1
The nonlinear Schrödinger equation based on slowly varying approximation is usually applied to describe the pulse propagation in nonlinear waveguides. However, for the case of the…