Coherent laser-induced optical behaviors in three-coupled-quantum wells and their application to terahertz signal detection

Modulators for Terahertz Communication: The Current State of the Art

“…THz wave position in the electromagnetic spectrum is shown in Figure 1. THz wave occupies a crucial frequency range, because it usually carries vital physical information [7] which can be used in cutting-edge technologies [8, 9] such as wireless high-speed communications [10, 11], biomedical diagnostics [12–14], security imaging [15, 16], signal detection [17], and product quality control [18, 19]. However, the existing optical and microwave theories are unsuitable for THz wave perfectly [8].…”

Polarized control of Goos–Hänchen shifts in four-level quantized graphene nanostructures

“…Over the past two or three decades, nonlinear quantum optical phenomena based on quantum coherence and interference have been studied theoretically and experimentally in different coherent media [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These phenomena, due to their potential application in quantum information technologies and all-optical sensors, have been realized in semiconductor nanostructures and solid state media due to their discrete energy levels and strong dipole moment [20][21][22][23][24][25][26][27].…”

Impact of incoherent pumping field and Er3+ion concentration on group velocity and index of refraction in an Er3+-doped YAG crystal

“…Quantum coherence and interference can lead to many interesting phenomena in quantum and nonlinear optics. These phenomena, such as electromagnetically induced transparency (EIT) [1,2], large Kerr nonlinearity [3][4][5], four wave mixing (FWM) [6][7][8][9][10], optical bistability (OB) and optical multistability (OM) [11][12][13][14][15][16][17][18][19][20], atom localization [21][22][23][24][25] and other interesting phenomena [26][27][28][29][30][31][32][33][34][35], have been studied by many famous research groups. Also, it is known that a large refractive index without absorption-based atomic coherence and quantum interference can be obtained in atomic systems.…”