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QuantumATK => General Questions and Answers => Topic started by: Wisam1222 on August 8, 2021, 10:43

Title: second harmonic generation
Post by: Wisam1222 on August 8, 2021, 10:43

Hello Quantum atk users
I tried to Execution second harmonic generation for some crystals, but the result was zero.
Please help me solve this problem.
Execution file is attached
Thank you all

Title: Re: second harmonic generation
Post by: Tue Gunst on August 10, 2021, 09:47

Not all materials are nonlinear optical materials. SHG is zero in systems with inversion symmetry for instance.
I recommend checking the GaAs example for instance on the object to learn about typical parameter settings:
https://docs.quantumatk.com/manual/Types/SecondHarmonicsGenerationSusceptibility/SecondHarmonicsGenerationSusceptibility.html