Cargando…
Extraordinary carrier multiplication gated by a picosecond electric field pulse
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 detecto...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2011
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3247824/ https://www.ncbi.nlm.nih.gov/pubmed/22186890 http://dx.doi.org/10.1038/ncomms1598 |
_version_ | 1782220173346865152 |
---|---|
author | Hirori, H. Shinokita, K. Shirai, M. Tani, S. Kadoya, Y. Tanaka, K. |
author_facet | Hirori, H. Shinokita, K. Shirai, M. Tani, S. Kadoya, Y. Tanaka, K. |
author_sort | Hirori, H. |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-3247824 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-32478242012-01-11 Extraordinary carrier multiplication gated by a picosecond electric field pulse Hirori, H. Shinokita, K. Shirai, M. Tani, S. Kadoya, Y. Tanaka, K. Nat Commun Article 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. Nature Publishing Group 2011-12-20 /pmc/articles/PMC3247824/ /pubmed/22186890 http://dx.doi.org/10.1038/ncomms1598 Text en Copyright © 2011, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ |
spellingShingle | Article Hirori, H. Shinokita, K. Shirai, M. Tani, S. Kadoya, Y. Tanaka, K. Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title | Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title_full | Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title_fullStr | Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title_full_unstemmed | Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title_short | Extraordinary carrier multiplication gated by a picosecond electric field pulse |
title_sort | extraordinary carrier multiplication gated by a picosecond electric field pulse |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3247824/ https://www.ncbi.nlm.nih.gov/pubmed/22186890 http://dx.doi.org/10.1038/ncomms1598 |
work_keys_str_mv | AT hirorih extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse AT shinokitak extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse AT shiraim extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse AT tanis extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse AT kadoyay extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse AT tanakak extraordinarycarriermultiplicationgatedbyapicosecondelectricfieldpulse |