Inelastic light scattering from plasmons tunneling between Wannier-Stark states

Fluegel, B.; Pfeiffer, L. N.; West, K.; Mascarenhas, A.

doi:10.1063/1.5025851

Title: Inelastic light scattering from plasmons tunneling between Wannier-Stark states

Journal Article · Wed Jun 06 00:00:00 EDT 2018 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5025851· OSTI ID:1457124

Fluegel, B. ^[1]; Pfeiffer, L. N. ^[2]; West, K. ^[2]; Mascarenhas, A. ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Princeton Univ., Princeton, NJ (United States)

Using inelastic light scattering, we measure the zone-center electronic excitation modes in a set of multiple quantum wells. The width of the wavefunction barriers was chosen such that it prevents significant coupling of the electron ground states between wells yet is transparent to electron tunneling under an electric field. Under these conditions, we find charge-density-like and spin-density-like plasmons whose energies do not correspond to the excitations calculated for either a single well or a set of Coulomb-coupled wells. The observed energies are proportional to the electric field strength and the lower energy modes agree with predictions for plasmons tunneling between the Wannier-Stark ladder states.

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Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1457124

Alternate ID(s):: OSTI ID: 1440798

Report Number(s):: NREL/JA-5K00-71495; TRN: US1901296

Journal Information:: Journal of Applied Physics, Vol. 123, Issue 21; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Inelastic light scattering from plasmons tunneling between Wannier-Stark states

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References (19)

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