Optimization of optical absorption coefficient in asymmetric double rectangular quantum wells by PSO algorithm

Abstract Optical absorption coefficient for asymmetric double rectangular quantum wells is optimized by the use of the particle swarm optimization (PSO) algorithm. By applying this method and numerical solution of Schrodinger equation, optimal quantum structure is determined for maximized absorption coefficient. Results show that the total absorption coefficient for this structure is 2.5365 × 10 5 m − 1 and its sensitivity is more than the changes of the first well width. Then the refractive index changes are investigated by using the density matrix method.

[1]  D. DiVincenzo,et al.  Quantum computation with quantum dots , 1997, cond-mat/9701055.

[2]  Keith W. Goossen,et al.  Grating enhanced quantum well detector , 1985 .

[3]  Takahiro Numai.  Fundamentals of semiconductor lasers , 2004 .

[4]  L. C. West,et al.  First observation of an extremely large‐dipole infrared transition within the conduction band of a GaAs quantum well , 1985 .

[5]  Chuang,et al.  Intersubband optical absorption in a quantum well with an applied electric field. , 1987, Physical review. B, Condensed matter.

[6]  Narrow band infrared detection in multiquantum well structures , 1985 .

[7]  Yoshiaki Nakata,et al.  New Optical Memory Structure Using Self-Assembled InAs Quantum Dots , 1995 .

[8]  Liu,et al.  Static and dynamic properties of coupled electron-electron and electron-hole layers. , 1996, Physical Review B (Condensed Matter).

[9]  K. Guo,et al.  Polaron effects on the optical absorptions in asymmetrical semi-parabolic quantum wells , 2007 .

[10]  Akio Sasaki,et al.  All‐optical modulation using an n‐doped quantum‐well structure , 1990 .

[11]  Zhang Li.  Calculation of Linear and Nonlinear Intersubband Optical Absorptions in Electric-Field-Biased Semiparabolic Quantum Wells , 2004 .

[12]  S. Yee,et al.  Free carrier induced changes in the absorption and refractive index for intersubband optical transitions in AlxGa1−xAs/GaAs/AlxGa1−xAs quantum wells , 1991 .

[13]  M. Jaroš,et al.  Intersubband optical transitions in Si‐Si0.5Ge0.5 superlattices , 1989 .

[14]  Emmanuel Rosencher,et al.  Giant nonlinear optical rectification at 8–12 μm in asymmetric coupled quantum wells , 1990 .

[15]  J. Gordon,et al.  Coherent and incoherent tunneling in asymmetric double quantum wells , 1992 .

[16]  H. Sakaki,et al.  Gigantic negative transconductance and mobility modulation in a double‐quantum‐well structure via gate‐controlled resonant coupling , 1993 .

[17]  David A. B. Miller,et al.  Electroabsorption in GaAs/AlGaAs coupled quantum well waveguides , 1987 .

[18]  A. Terzis,et al.  Linear and nonlinear optical absorption coefficients in inverse parabolic quantum wells under static external electric field , 2011, The European Physical Journal B.

[19]  Sotirios Baskoutas,et al.  Second and Third Harmonic Generation Susceptibilities of Spherical Quantum Dots: Effects of Impurities, Electric Field and Size , 2009 .

[20]  A. Terzis,et al.  Effects of excitons in nonlinear optical rectification in semiparabolic quantum dots , 2006 .

[21]  Sotirios Baskoutas,et al.  Linear and nonlinear optical absorption coefficients and refractive index changes in spherical quantum dots : Effects of impurities, electric field, size, and optical intensity , 2008 .

[22]  M. Tomak,et al.  Linear and nonlinear intersubband optical absorptions in an asymmetric rectangular quantum well , 2007 .

[23]  K. Guo,et al.  Linear and nonlinear intersubband optical absorption in double triangular quantum wells , 2009 .

[24]  M. Soler.  Integral methods in kinetic problems , 1989 .

[25]  A. Terzis,et al.  Electronic structure and nonlinear optical rectification in a quantum dot: effects of impurities and external electric field , 2007 .

[26]  K. L. Wang,et al.  Large Stark effects for transitions from local states to global states in quantum well structures , 1989 .

[27]  M. Tomak,et al.  Nonlinear optical rectification in asymmetrical semiparabolic quantum wells , 2005 .

[28]  I. Karabulut,et al.  Linear and nonlinear intersubband optical absorption coefficients and refractive index changes in a quantum box with finite confining potential , 2006 .

[29]  N. Ledentsov,et al.  Gain and differential gain of single layer InAs/GaAs quantum dot injection lasers , 1996 .

[30]  Miller,et al.  Relation between electroabsorption in bulk semiconductors and in quantum wells: The quantum-confined Franz-Keldysh effect. , 1986, Physical review. B, Condensed matter.