Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide crossings
M. Hammer, S. Alhaddad, J. Förstner, Journal of the Optical Society of America B 34 (2017) 613–624.

Spiral modes supported by circular dielectric tubes and tube segments
L. Ebers, M. Hammer, J. Förstner, Optical and Quantum Electronics 49 (2017) 49:176.

Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits
A. Hildebrandt, S. Alhaddad, M. Hammer, J. Förstner, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX, SPIE, 2016.

Wave interaction in photonic integrated circuits: Hybrid analytical / numerical coupled mode modeling
M. Hammer, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX, SPIE, 2016, pp. 975018-975018–8.

Planar prism spectrometer based on adiabatically connected waveguiding slabs
F. Civitci, M. Hammer, H.J.W.M. Hoekstra, Optics Communications 365 (2015) 29–37.

Full Resonant Transmission of Semiguided Planar Waves Through Slab Waveguide Steps at Oblique Incidence
M. Hammer, A. Hildebrandt, J. Förstner, Journal of Lightwave Technology 34 (2015) 997–1005.

How planar optical waves can be made to climb dielectric steps
M. Hammer, A. Hildebrandt, J. Förstner, Optics Letters 40 (2015) 3711–3714.

Oblique incidence of semi-guided waves on rectangular slab waveguide discontinuities: A vectorial QUEP solver
M. Hammer, Optics Communications 338 (2014) 447–456.

General relation for group delay and the relevance of group delay for refractometric sensing
H.J.W.M. Hoekstra, M. Hammer, Journal of the Optical Society of America B 31 (2014).