Khorasani, Sina
Third-Order Optical Nonlinearity in Two-Dimensional Transition Metal Dichalcogenides
Communications in Theoretical Physics
Communications in Theoretical Physics
Communications in Theoretical Physics
Communications in Theoretical Physics
70
3
2d materials
nonlinear optics
transition metal dichalcogenides
quantum optics
minimum-uncertainty packets
quantum-noise reduction
2-photon absorption
squeezed states
single-layer
conducting interfaces
harmonic-generation
equivalence classes
room-temperature
monolayer wse2
Physics, Multidisciplinary
Physics
2018
2018-09-01
We present a detailed calculation of the linear and nonlinear optical response of four types of monolayer twodimensional (2D) transition-metal dichalcogenides (TMDCs), having the formula MX2 with M = Mo, W and X = S, Se. The calculations are based on 6-band tight-binding model of TMDCs, and then performing a semi-classical perturbation analysis of response functions. We numerically calculate the linear chi((1))(mu nu) (-omega;omega) and nonlinear surface susceptibility tensors chi mu nu zeta eta((3)) (-omega(Sigma);omega(r),omega(s),omega(t)) with omega(Sigma) = omega(r)+ omega(s) +omega(t) . Both non-degenerate and degenerate cases are studied for thirdharmonic generation and nonlinear refractive index, respectively. Computational results obtained with no external fitting parameters are discussed regarding two recent reported experiments on MoS2 , and thus we can confirm the extraordinarily strong optical nonlinearity of TMDCs. As a possible application, we demonstrate generation of a pi/4-rotated squeezed state by means of nonlinear response of TMDCs, in a silica micro-disk resonator covered with the 2D material. Our proposed method will enable accurate calculations of nonlinear optical response, such as four-wave mixing and highharmonic generation in 2D materials and their heterostructures, thus enabling study of novel functionalities of 2D photonic integrated circuits.
0253-6102
Communications in Theoretical Physics
Journal Articles
000445114600016