Abstract
Absorption cross section of triple barrier double quantum well structure is analytically computed with Pöschl-Teller potential geometry considering the intraband transition from ground to first excited state. Peak values of absorption cross section are noted which reflects active area for optical transitions has dimensions in sub-micron range. Structural parameters are varied to compute the possible variation of that cross section, taking into account the first order band nonparabolicity. Oscillator strength is also calculated as a function of incident wavelength which indicates the statistical possibility of transition is higher with increasing wavelength between those two quantum states. Simulated findings are compared with the data available for rectangular well which speaks in favor of the Pöschl-Teller geometry owing to lower energy spreading and higher peak value. Results stand in favor of the present potential configuration as proposed in the paper, and therefore can be utilized for design of quantum well-based photonic detector.
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Deyasi, A., Bhowmick, S., Debnath, P., Sarkar, A. (2022). Investigating Absorption Cross Section and Oscillator Strength for Double Quantum Well with Pöschl-Teller Potential. In: Acharyya, A., Biswas, A., Das, P. (eds) Generation, Detection and Processing of Terahertz Signals. Lecture Notes in Electrical Engineering, vol 794. Springer, Singapore. https://doi.org/10.1007/978-981-16-4947-9_2
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