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.

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.

Resonant evanescent excitation of guided waves with high-order optical angular momentum
M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 38 (2021) 1717.

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

Integrated superconducting nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides
J.P. Höpker, V.B. Verma, M. Protte, R. Ricken, V. Quiring, C. Eigner, L. Ebers, M. Hammer, J. Förstner, C. Silberhorn, R.P. Mirin, S. Woo Nam, T. Bartley, Journal of Physics: Photonics 3 (2021) 034022.

Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles
M. Hammer, L. Ebers, J. Förstner, Optical and Quantum Electronics 52 (2020).

Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method
L. Ebers, M. Hammer, J. Förstner, Optics Express 28 (2020) 36361.

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 quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating
M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America B 36 (2019) 2395.

Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter
L. Ebers, M. Hammer, M.B. Berkemeier, A. Menzel, J. Förstner, OSA Continuum 2 (2019) 3288.

Optical transition between two optical waveguides layer and method for transmitting light
M. Hammer, J. Förstner, L. Ebers, (2019).

Oblique evanescent excitation of a dielectric strip: A model resonator with an open optical cavity of unlimited Q
M. Hammer, L. Ebers, J. Förstner, Optics Express 27 (2019) 8.

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.

Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity
M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, J. Förstner, in: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), IEEE, 2018.