Calendar of Events

Events Calendar

Quantum materials: insights from near field nano-optics

Date and Time: Wednesday, February 27, 2019, 10:30am - 11:30am
Location: Physics and Astronomy Lecture Hall

Speaker: D.N. Basov (Columbia University,

In 1944 Hans Bethe reported on “the diffraction of electromagnetic radiation by a hole small compared with the wave-length” [Physical Review 66, 163 (1944)]. This seminal paper was among the early precursors to a new and vibrant area of research: near field nano-optics. I will discuss recent nano-optical experiments on quantum materials including graphene and other atomically layered crystals. Central to the nano-optical exploration of quantum materials is the notion of polaritons: hybrid light-matter modes that are omnipresent in polarizable media [Nature Materials 16, 1077 (2017)]. Infrared nano-optics allows one to directly image polaritonic standing waves yielding rich insights into the electronic phenomena of the host material supporting polaritons [Science 354, 195 (2016)]. We utilized this novel general approach to investigate the physics of ballistic electronic transport in graphene [Nature 557, 530 (2018)] and of topological conducting channels also in graphene [Science 362, 1153 (2018)].

Extra Info: Please contact our administrative assistant Lisa Rivera (lrivera at with questions regarding travel arrangements and reimbursements. Questions about the colloquium schedule should be addressed to Prof. Misha Gershenson (gersh at
  • Host: Sang-Wook Cheong
  • Tea, coffee, and cookies served at 10:20
  • All welcome!