title: Terahertz beat frequency generation from two-mode lasing operation of coupled microdisk laser.
abstract: We propose a coupled microdisk laser as a compact and tunable laser source for the generation of a coherent continuous-wave terahertz radiation by photomixing. Using the Schrödinger-Bloch model including the nonlinear effect of active medium, we find single-mode and two-mode lasings depending on the pumping strength. We explain the transitions of lasing modes in terms of resonant modes that are the solutions of the Schrödinger-Bloch model without active medium and nonlinear interaction. In particular, a two-mode lasing is shown to generate a terahertz oscillating frequency originating from the light beating of two nearly degenerated resonant modes with different symmetries.
authors.affiliation: Department of Physics, Pusan National University, Busan, South Korea.
authors.forename: Jung-Wan
authors.initials: JW
authors.lastname: Ryu
authors.forename: Jinhang
authors.initials: J
authors.lastname: Cho
authors.forename: Chil-Min
authors.initials: CM
authors.lastname: Kim
authors.forename: Susumu
authors.initials: S
authors.lastname: Shinohara
authors.forename: Sang Wook
authors.initials: SW
authors.lastname: Kim