Quantum light and topological surface states. (8th November 2017)

• Record Type: Journal Article
• Authors: Dai, C M; Wang, W; Yi, X X
• Is Part Of: Journal of physics. Volume 50:Number 23(2017:Dec. 01)
• Publication Date: 2017-11-08
• Subjects: optoelectronic -- quantum light -- surface states -- spintronic; 03.65.-w -- 42.50.Lc -- 41.50.+h; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aa92e5
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We demonstrate theoretically that, when quantum light interacts with massless Dirac fermions on the surface of a three-dimensional topological insulator, the elementary excitation spectrum depends on the polarizations of quantum light. Linear-polarized light cannot open a gap and leads to an anisotropic Dirac cone, but circular-polarized light can induce a mass term and the sign of mass is determined by the helicity of light. The effects due to quantum fluctuations are also discussed.