TY - EJOUR
DO - 10.1088/0253-6102/70/3/344
AB - 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.
T1 - Third-Order Optical Nonlinearity in Two-Dimensional Transition Metal Dichalcogenides
IS - 3
DA - 2018-09-01
AU - Khorasani, Sina
JF - Communications in Theoretical Physics
SP - 344-360
VL - 70
EP - 344-360
ID - 261761
KW - 2d materials
KW - nonlinear optics
KW - transition metal dichalcogenides
KW - quantum optics
KW - minimum-uncertainty packets
KW - quantum-noise reduction
KW - 2-photon absorption
KW - squeezed states
KW - single-layer
KW - conducting interfaces
KW - harmonic-generation
KW - equivalence classes
KW - room-temperature
KW - monolayer wse2
SN - 0253-6102
SN - 1572-9494
ER -