Phys. Rev. Research 2, 012017(R) (2020) - Difference frequency generation in topological semimetals

Phys. Rev. Research 2, 012017(R) (2020) - Difference frequency generation in topological semimetals

In this work, the authors present the theory of difference frequency generation in metals. By drawing a connection to the circular photogalvanic effect, the authors show that difference frequency generation in chiral topological semimetals is quantized and independent of material parameters, including the scattering time. In addition, this work uncovers a free carrier contribution to this effect with singular frequency dependence which could also be observed with current techniques

Date: 2020/01/15 00:00

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