Role of Two-Photon Electronic Transitions in the Formation of Active Dynamic Conductivity in a Three-Barrier Resonance Tunneling Structure with an Applied DC Electric Field
DOI:
https://doi.org/10.15407/ujpe61.01.0066Keywords:
resonance tunneling structure, quantum cascade laser, quantum cascade detector, active dynamic conductivity, two-photon electronic transitionAbstract
The theory of active dynamic conductivity in a three-barrier resonance tunneling structure subjected to the combined action of a weak electromagnetic field and a longitudinal dc electric field is developed with regard for the contribution of laser-induced one- and two-photon electronic transitions with different frequencies. For this purpose, the full Schr¨odinger equation is solved in the effective mass approximation and with the use of the model of rectangular potential wells and barriers for an electron. The maximum contribution of two-photon transitions to the formation of the total active dynamic conductivity in laser-induced transitions is shown not to exceed 38%. Geometric configurations of the resonance tunneling structure, for which the laser radiation intensity increases due to laser-induced two-photon electronic transitions, are determined.
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Kyiv, Ukraine
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