Stimulated terahertz emission from intraexcitonic transitions in Cu2O

Rupert Huber; Ben A. Schmid; Y. Ron Shen; Daniel S. Chemla; Robert A. Kaindl

doi:10.1103/PhysRevLett.96.017402

Stimulated terahertz emission from intraexcitonic transitions in Cu2O

Rupert Huber, Ben A. Schmid, Y. Ron Shen, Daniel S. Chemla, Robert A. Kaindl

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

We report the first observation of stimulated emission of terahertz radiation from internal transitions of excitons. The far-infrared electromagnetic response of Cu2O is monitored via broadband terahertz pulses after ultrafast resonant excitation of three-dimensional 3p excitons. Stimulated emission from the 3p to the energetically lower 2s bound level occurs at a photon energy of 6.6Â meV, with a cross section of â10-14cm2. Simultaneous excitation of both exciton levels, in turn, drives quantum beats, which lead to efficient terahertz emission sharply peaked at the difference frequency.

Original language	English (US)
Article number	017402
Journal	Physical Review Letters
Volume	96
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.96.017402
State	Published - Jan 13 2006
Externally published	Yes

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Physics and Astronomy(all)

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10.1103/PhysRevLett.96.017402

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title = "Stimulated terahertz emission from intraexcitonic transitions in Cu2O",

abstract = "We report the first observation of stimulated emission of terahertz radiation from internal transitions of excitons. The far-infrared electromagnetic response of Cu2O is monitored via broadband terahertz pulses after ultrafast resonant excitation of three-dimensional 3p excitons. Stimulated emission from the 3p to the energetically lower 2s bound level occurs at a photon energy of 6.6{\^A} meV, with a cross section of {\^a}10-14cm2. Simultaneous excitation of both exciton levels, in turn, drives quantum beats, which lead to efficient terahertz emission sharply peaked at the difference frequency.",

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T1 - Stimulated terahertz emission from intraexcitonic transitions in Cu2O

AU - Huber, Rupert

AU - Schmid, Ben A.

AU - Shen, Y. Ron

AU - Chemla, Daniel S.

AU - Kaindl, Robert A.

PY - 2006/1/13

Y1 - 2006/1/13

N2 - We report the first observation of stimulated emission of terahertz radiation from internal transitions of excitons. The far-infrared electromagnetic response of Cu2O is monitored via broadband terahertz pulses after ultrafast resonant excitation of three-dimensional 3p excitons. Stimulated emission from the 3p to the energetically lower 2s bound level occurs at a photon energy of 6.6Â meV, with a cross section of â10-14cm2. Simultaneous excitation of both exciton levels, in turn, drives quantum beats, which lead to efficient terahertz emission sharply peaked at the difference frequency.

AB - We report the first observation of stimulated emission of terahertz radiation from internal transitions of excitons. The far-infrared electromagnetic response of Cu2O is monitored via broadband terahertz pulses after ultrafast resonant excitation of three-dimensional 3p excitons. Stimulated emission from the 3p to the energetically lower 2s bound level occurs at a photon energy of 6.6Â meV, with a cross section of â10-14cm2. Simultaneous excitation of both exciton levels, in turn, drives quantum beats, which lead to efficient terahertz emission sharply peaked at the difference frequency.

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ER -

Stimulated terahertz emission from intraexcitonic transitions in Cu2O

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