Circular dichroism in STM-excited luminescence on metals
IBM Research Division, Zurich Research Laboratory - 8803 Rüschlikon, Switzerland
Accepted: 31 October 1996
For a tunneling junction formed by an asymmetric tip apex and a flat surface, we find that highly circularly polarized light can be emitted by inelastic tunneling excitation. Furthermore, the degree of circular polarization exhibits a strong dependence on the azimuthal angle of emission. This indicates that the geometrical features of the tip apex can define a chiral system.
PACS: 33.55.Ad – Optical activity, optical rotation; circular dichroism / 11.30.Rd – Chiral symmetries / 73.20.Mf – Collective excitations (including plasmons and other charge-density excitations)
© EDP Sciences, 1996