@articleHammer_Ebers_Förstner_2021, title=Configurable lossless broadband beam splitters for semi-guided waves in integrated silicon photonics, volume=4, DOI=10.1364/osac.437549, number=12, journal=OSA Continuum, author=Hammer, Manfred and Ebers, Lena and Förstner, Jens, year=2021, pages=3081 

@articleEbers_Hammer_Berkemeier_Menzel_Förstner_2019, title=Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated optical add-drop filter, volume=2, DOI=10.1364/osac.2.003288, journal=OSA Continuum, author=Ebers, Lena and Hammer, Manfred and Berkemeier, Manuel B. and Menzel, Alexander and Förstner, Jens, year=2019, pages=3288