Ultrafast optical currents in gapped graphene
Abstract
Abstract We theoretically study the interaction of ultrashort optical pulses with gapped graphene. Such a strong pulse results in a finite conduction band population and a corresponding electric current, both during and after the pulse. Since gapped graphene has broken inversion symmetry, it has an axial symmetry about the y -axis but not about the x -axis. We show that, in this case, if the linear pulse is polarized along the x -axis, the rectified electric current is generated in the y direction. At the same time, the conduction band population distribution in the reciprocal space is symmetric about the x -axis. Thus, the rectified current in gapped graphene has an inter-band origin, while the intra-band contribution to the rectified current is zero.
- Authors:
- Publication Date:
- Research Org.:
- Georgia State Univ., Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1573114
- Alternate Identifier(s):
- OSTI ID: 1800012
- Grant/Contract Number:
- FG02-01ER15213; SC0007043
- Resource Type:
- Published Article
- Journal Name:
- Journal of Physics. Condensed Matter
- Additional Journal Information:
- Journal Name: Journal of Physics. Condensed Matter Journal Volume: 32 Journal Issue: 6; Journal ID: ISSN 0953-8984
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Oliaei Motlagh, S. Azar, Nematollahi, Fatemeh, Mitra, Aranyo, Zafar, Ahmal Jawad, Apalkov, Vadym, and Stockman, Mark I. Ultrafast optical currents in gapped graphene. United Kingdom: N. p., 2019.
Web. doi:10.1088/1361-648X/ab4fc7.
Oliaei Motlagh, S. Azar, Nematollahi, Fatemeh, Mitra, Aranyo, Zafar, Ahmal Jawad, Apalkov, Vadym, & Stockman, Mark I. Ultrafast optical currents in gapped graphene. United Kingdom. https://doi.org/10.1088/1361-648X/ab4fc7
Oliaei Motlagh, S. Azar, Nematollahi, Fatemeh, Mitra, Aranyo, Zafar, Ahmal Jawad, Apalkov, Vadym, and Stockman, Mark I. Mon .
"Ultrafast optical currents in gapped graphene". United Kingdom. https://doi.org/10.1088/1361-648X/ab4fc7.
@article{osti_1573114,
title = {Ultrafast optical currents in gapped graphene},
author = {Oliaei Motlagh, S. Azar and Nematollahi, Fatemeh and Mitra, Aranyo and Zafar, Ahmal Jawad and Apalkov, Vadym and Stockman, Mark I.},
abstractNote = {Abstract We theoretically study the interaction of ultrashort optical pulses with gapped graphene. Such a strong pulse results in a finite conduction band population and a corresponding electric current, both during and after the pulse. Since gapped graphene has broken inversion symmetry, it has an axial symmetry about the y -axis but not about the x -axis. We show that, in this case, if the linear pulse is polarized along the x -axis, the rectified electric current is generated in the y direction. At the same time, the conduction band population distribution in the reciprocal space is symmetric about the x -axis. Thus, the rectified current in gapped graphene has an inter-band origin, while the intra-band contribution to the rectified current is zero.},
doi = {10.1088/1361-648X/ab4fc7},
journal = {Journal of Physics. Condensed Matter},
number = 6,
volume = 32,
place = {United Kingdom},
year = {2019},
month = {11}
}
https://doi.org/10.1088/1361-648X/ab4fc7
Web of Science
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