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    • 3. 发明授权
    • Optical diode
    • US09952384B2
    • 2018-04-24
    • US15504084
    • 2015-08-18
    • Technische Universitat Wien
    • Jürgen VolzPhilipp SchneeweissClement SayrinArno Rauschenbeutel
    • G02B6/126G02F1/095G02B6/122
    • G02B6/126G02B6/105G02B6/1226G02B2006/12157G02F1/0136G02F1/0955G02F2202/108G02F2202/36G02F2203/10
    • An optical diode (1) comprising an optical wave guide for guiding light, preferably of a light mode, with a vacuum wavelength λ0, wherein the optical wave guide has a wave guide core (2, 3, 14) with a first index of refraction (n1), and the wave guide core (2, 3, 14) is surrounded by at least one second optical medium which has at least one second index of refraction (n2), wherein n1>n2 applies, wherein the wave guide core (2, 3, 14) has at least in sections a smallest lateral dimension (7) which is a smallest dimension of a cross section (6) perpendicular to a propagation direction (5) of the light in the wave guide core (2, 3, 14), wherein the smallest lateral dimension (7) is greater than or equal to λ0/(5*n1) and less than or equal to 20*λ0/n1, wherein the optical diode (1) additionally comprises at least one absorber element (10, 11, 15, 16) which is arranged in a near field, wherein the near field consists of the electromagnetic field of the light of the vacuum wavelength λ0 in the wave guide core (2, 3, 14) and outside of the wave guide core (2, 3, 14) up to a standard interval (12) of 5*λ0, wherein the standard interval (12) is measured starting from one surface (8) of the wave guide core (2, 3, 14) forming an optical interface and in a direction perpendicular to the surface (8). The invention provides that the at least one absorber element (10, 11, 15, 16) for the light of the vacuum wavelength λ0 has a strongly different absorption for left circular polarization (σ−) and for right circular polarization (σ+).