Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides
M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878.

Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching
N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society of America B 41 (2024) 2077.

Guided modes of thin-film lithium niobate slabs
M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.

How to suppress radiative losses in high-contrast integrated Bragg gratings
M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.

Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber
M. Hammer, L. Ebers, J. Förstner, in: D.L. Andrews, E.J. Galvez, H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI, SPIE, 2022, p. 120170F.

Semi-guided waves in integrated optical waveguide structures
L. Ebers, Semi-Guided Waves in Integrated Optical Waveguide Structures, 2022.

Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint
H. Nikbakht, M.T. Khoshmehr, B. van Someren, D. Teichrib, M. Hammer, J. Förstner, B.I. Akca, Optics Letters 48 (2022) 207.

Flexible source of correlated photons based on LNOI rib waveguides
L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 025001.

Small-scale online simulations in guided-wave photonics
M. Hammer, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI, SPIE, 2022, p. 1200414.

Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics
M. Hammer, L. Ebers, J. Förstner, OSA Continuum 4 (2021) 3081.

Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum Photonics
M. Protte, L. Ebers, M. Hammer, J.P. Höpker, M. Albert, V. Quiring, C. Meier, J. Förstner, C. Silberhorn, T. Bartley, in: OSA Quantum 2.0 Conference, 2020.

Oblique incidence of semi-guided planar waves on slab waveguide steps: effects of rounded edges
L. Ebers, M. Hammer, J. Förstner, Optics Express 26 (2018) 18621–18632.

Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical Approach to Coupled Mode Theory
M. Hammer, in: A. Agrawal (Ed.), Recent Trends in Computational Photonics, 204th ed., Springer, 2017, pp. 77–105.

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.