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Cloaking of metal grid electrodes on Lambertian emitters by free-form refractive surfaces

Schumann, Martin F.; Fritz, Benjamin; Eckstein, Ralph; Lemmer, Uli; Gomard, Guillaume; Wegener, Martin

We discuss invisibility cloaking of metal grid electrodes on Lambertian light emitters by using dielectric free-form surfaces. We show that cloaking can be ideal in geometrical optics for all viewing directions if reflections at the dielectric–air interface are negligible. We also present corresponding white-light proof-of-principle experiments that demonstrate close-to-ideal cloaking for a wide range of viewing angles. Remaining imperfections are analyzed by ray-tracing calculations. The concept can potentially be used to enhance the luminance homogeneity of large-area organic light-emitting diodes.

Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 0146-9592, 1539-4794
KITopen ID: 1000079960
HGF-Programm 43.23.04; LK 01
Erschienen in Optics letters
Band 43
Heft 3
Seiten 527-530
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