Laser-induced diffraction grating in asymmetric double quantum well nanostructure

Abstract

We analyze the electromagnetically induced grating in a four-level inverted-Y double quantum well system. Based on the electromagnetically induced transparency, the Fraunhofer diffraction of a weak probe laser field is theoretically investigated. It is shown that the diffraction patterns are sensitive to both the absorptive and dispersive properties of the system. The effect of coupling and pumping fields intensity, frequency detuning, the relative phase of fields and the sample interaction length on diffraction pattern is then discussed. Our scheme may find potential applications in designing the semiconductor quantum well-based photonic devices, such as all-optical switches at low light levels.

Multi-wave-mixing-induced nonlinear modulation of diffraction peaks in an opto-atomic grating

“…Following the generic models in rarefied medium a good number of attempts have been made to explore the phenomenon of EIG in solid state media such as, semiconductor quantum nanostructures [38][39][40][41][42][43][44] . A different method of obtaining dual EIG has been studied on the basis of spatially modulated biexciton coherence in Ref.…”

“…40 . Phase-dependent generation of EIG has been addressed also in those works 40,41 . A new scheme based on semiconductor quantum dot and metal nanoparticle hybrid system is proposed to realize EIG 42,43 .…”

“…41 on the basis of following conditions to be satisfied: ρ 0 , and ρ jk = ρ * kj . By making the substitutions: ρ(ρ 41 e −iφ p , R p = |R p |e iφ p , R m = |R m |e iφ m , R n (x) = |R n (x)|e iφ n , R c = |R c |e iφ c with the condition φ p = φ m + φ n + φ c , we obtain with…”

Selectivity analysis of femtosecond laser polarizer by three-layer grating

“…Compared with ordinary light source, laser has the advantages of good mono-chromaticity, high brightness and good directivity, and the combination of diffraction grating and laser light source suitable for integration is widely used in many modern optical systems [1,2], such as switches [3][4][5][6], sensors [7][8][9][10], solar cells [11][12][13][14] spectrometer [15,16], polarizer [17,18], laser [19][20][21][22], beam splitter [23], wavelength multiplexers [24], and so on. The surface-relief grating is fabricated by a photolithography process [25].…”

Influence of the intense laser field on optical absorption coefficients and refractive index changes in the double trigonometric quantum wells

“…In 2012 and 2015, Yesilgul studied the effect of barrier width parameter and geometric parameters on OACs and RICs in asymmetric double semi-V-shaped quantum wells [18,19]. In 2019, Bozorgzadeh and Sahrai studied the electromagnetically induced gratings in a four-level inverted-Y double quantum well system [20]. In 2021, Durmuslar et al theoretically investigated the effect of structural parameters and a highfrequency intense laser field on the linear and nonlinear optical properties of a hyperbolic confinement potential [21].…”