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Article Dans Une Revue Physical Review Letters Année : 2020

Realization of Harmonic Oscillator Arrays with Graded Semiconductor Quantum Wells

Résumé

The harmonic oscillator is a foundational concept in both theoretical and experimental quantum mechanics. Here, we demonstrate harmonic oscillators in a semiconductor platform by faithfully implementing continuously graded alloy semiconductor quantum wells. Unlike current technology, this technique avoids interfaces that can hamper the system and allows for the production of multi-well stacks several µm thick. The experimentally measured system oscillations are at 3 THz for two structures containing 18 and 54 parabolic quantum wells. Absorption at room temperature is achieved: this is as expected from a parabolic potential and is unlike square quantum wells that require cryogenic operation. Linewidths below 11% of the central frequency are obtained up to 150 K, with a 5.6% linewidth obtained at 10 K. Furthermore, we show that the system correctly displays an absence of nonlinearity despite electron-electron interactions-analogous to the Kohn theorem. These high-quality structures already open up several new experimental vistas.
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Dates et versions

hal-03011984 , version 1 (23-11-2020)

Identifiants

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C. Deimert, P. Goulain, J.-M. Manceau, W. Pasek, T. Yoon, et al.. Realization of Harmonic Oscillator Arrays with Graded Semiconductor Quantum Wells. Physical Review Letters, 2020, 125 (9), pp.097403. ⟨10.1103/PhysRevLett.125.097403⟩. ⟨hal-03011984⟩
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