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Title: Extraordinary carrier multiplication gated by a picosecond electric field pulse.
Authors: Hirori, H  kyouindb  KAKEN_id  orcid (unconfirmed)
Shinokita, K  kyouindb  KAKEN_id  orcid (unconfirmed)
Shirai, M
Tani, S
Kadoya, Y
Tanaka, K  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 廣理, 英基
Keywords: Physical sciences
Applied physics
Materials science
Issue Date: Dec-2011
Publisher: Nature Publishing Group
Journal title: Nature communications
Volume: 2
Thesis number: 594
Abstract: The study of carrier multiplication has become an essential part of many-body physics and materials science as this multiplication directly affects nonlinear transport phenomena, and has a key role in designing efficient solar cells and electroluminescent emitters and highly sensitive photon detectors. Here we show that a 1-MVcm(-1) electric field of a terahertz pulse, unlike a DC bias, can generate a substantial number of electron-hole pairs, forming excitons that emit near-infrared luminescence. The bright luminescence associated with carrier multiplication suggests that carriers coherently driven by a strong electric field can efficiently gain enough kinetic energy to induce a series of impact ionizations that can increase the number of carriers by about three orders of magnitude on the picosecond time scale.
Rights: © 2011 Nature Publishing Group, a division of Macmillan Publishers Limited.
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit
DOI(Published Version): 10.1038/ncomms1598
PubMed ID: 22186890
Appears in Collections:Journal Articles

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