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1 April 2022 Tunability of nonlinear susceptibility in coupled quantum well systems using second-order supersymmetry
Nitish Chandra, Natalia M. Litchinitser
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Proceedings Volume PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; PC119850D (2022) https://doi.org/10.1117/12.2608848
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
Supersymmetry (SUSY) enables tuning of certain eigenvalues of quantum well without changing other states. We leverage second-order SUSY to tune the intermediate state of asymmetric coupled quantum well states. A family of such quantum wells can be used for upconversion of two bands of frequencies into a single frequency. We investigate the total nonlinear conversion of light in a metallic coupled quantum well system. We obtain non-uniform refractive index distributions required to tune the frequency of the intermediate state while leaving the ground and excited state unchanged. We repeat SUSY transformations to tune the eigenvalues required for third-order susceptibility.
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Nitish Chandra and Natalia M. Litchinitser "Tunability of nonlinear susceptibility in coupled quantum well systems using second-order supersymmetry", Proc. SPIE PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, PC119850D (1 April 2022); https://doi.org/10.1117/12.2608848
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KEYWORDS
Quantum wells
Complex systems
Upconversion
Quantum efficiency
Quantum physics
Refractive index
Second-harmonic generation
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