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Begbroke Science Park > Events > Begbroke Science Forum 27 November 2014 13.00 Blenheim Room, Farmhouse, Begbroke Science Park

Date(s) - 27/11/2014
1:00 pm - 2:00 pm

Begbroke Science Forum: Two-dimeAlexander Tartakovskiinsional semiconducting films in optical microcavities

 27 November 2014 13.00- 14.00, Blenheim Room, Farmhouse, Begbroke Science Park


Prof. Alexander Tartakovskii, from the Department of Physics and Astronomy at the University of Sheffield will deliver a talk on Two-dimensional semiconducting films in optical microcavities as part of the Begbroke Science Forum.

Layered metal-chalcogenides (MC) exhibit new attractive properties when cleaved into quasi-two-dimensional (2D) films. Of particular interest are transition metal dichalcogenides (TMDCs) such as MoS2, MoSe2, WS2, WSe2, which become direct band semiconductors in a form of a single monolayer. These materials exhibit very robust excitons with binding energies of around 0.3-0.5 eV, 30-50 times higher than in III-V heterostructures, and have surprisingly strong absorption of up to 30% in a single monolayer. These properties make them interesting candidates for strong light-matter interaction experiments and studies of non-linear effects in truly 2D polariton systems. Here I will present our recent results and will review fabrication of microcavities comprising semiconducting 2D films; report on observation of the Purcell effect in emission of thin GaSe and MoS2 films and demonstration of 2D polariton states in tunable optical microcavities.

His talk will begin at 13.00  in the Blenheim Room in the Farmhouse, Begbroke Science Park. There is a minibus leaving Parks Road at 12.31 which will arrive at Begbroke at 12.50 and is ideal for this talk.  View the timetable here.

Refreshments will be provided, you are welcome to bring your own lunch. We look forward to welcoming you to this talk.