Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe2

M. Hemmat; H. Vergnet; R. Ferreira; J. Mangeney; X. Yu; Y. He; Z. Liu; Q. Wang; J. Tignon; E. Baudin; S. Dhillon

doi:10.1109/IRMMW-THz50927.2022.9895953

Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe₂

M. Hemmat, H. Vergnet, R. Ferreira, J. Mangeney, X. Yu, Y. He, Z. Liu, Q. Wang, J. Tignon, E. Baudin, S. Dhillon

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

PtSe2 is a promising 2D material for the THz range as its bandgap that can be tuned from an indirect semiconductor to a semimetal with the number of atomic layers, unlike other transition metal dichalcogenides. Here we use Terahertz (THz) emission time domain spectroscopy (TDS) to investigate PtSe2 as a function of number of 2D layers. We demonstrate the THz emission from this material for the first time and show that this is a result of second order nonlinear photocurrents in PtSe2, with contributions from photon drag and photogalvanic effects. We also show how the PtSe2 bandstructure dependence on the number of 2D layers radically changes its THz emission properties, rendering PtSe2 a promising material for THz photonics.

Original language	English
Title of host publication	IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves
Publisher	IEEE Computer Society
ISBN (Electronic)	9781728194271
DOIs	https://doi.org/10.1109/IRMMW-THz50927.2022.9895953
Publication status	Published - 2022
Externally published	Yes
Event	47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 - Delft, Netherlands Duration: Aug 28 2022 → Sept 2 2022

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume	2022-August
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Conference

Conference	47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022
Country/Territory	Netherlands
City	Delft
Period	8/28/22 → 9/2/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

ASJC Scopus Subject Areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/IRMMW-THz50927.2022.9895953

Cite this

Hemmat, M., Vergnet, H., Ferreira, R., Mangeney, J., Yu, X., He, Y., Liu, Z., Wang, Q., Tignon, J., Baudin, E., & Dhillon, S. (2022). Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe₂. In IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2022-August). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz50927.2022.9895953

@inproceedings{ce14db9b94a54a3290d5794ae4621390,

title = "Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe2",

abstract = "PtSe2 is a promising 2D material for the THz range as its bandgap that can be tuned from an indirect semiconductor to a semimetal with the number of atomic layers, unlike other transition metal dichalcogenides. Here we use Terahertz (THz) emission time domain spectroscopy (TDS) to investigate PtSe2 as a function of number of 2D layers. We demonstrate the THz emission from this material for the first time and show that this is a result of second order nonlinear photocurrents in PtSe2, with contributions from photon drag and photogalvanic effects. We also show how the PtSe2 bandstructure dependence on the number of 2D layers radically changes its THz emission properties, rendering PtSe2 a promising material for THz photonics.",

author = "M. Hemmat and H. Vergnet and R. Ferreira and J. Mangeney and X. Yu and Y. He and Z. Liu and Q. Wang and J. Tignon and E. Baudin and S. Dhillon",

note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 ; Conference date: 28-08-2022 Through 02-09-2022",

year = "2022",

doi = "10.1109/IRMMW-THz50927.2022.9895953",

language = "English",

series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",

publisher = "IEEE Computer Society",

booktitle = "IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves",

address = "United States",

}

Hemmat, M, Vergnet, H, Ferreira, R, Mangeney, J, Yu, X, He, Y, Liu, Z, Wang, Q, Tignon, J, Baudin, E & Dhillon, S 2022, Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe₂. in IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2022-August, IEEE Computer Society, 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022, Delft, Netherlands, 8/28/22. https://doi.org/10.1109/IRMMW-THz50927.2022.9895953

Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe₂. / Hemmat, M.; Vergnet, H.; Ferreira, R. et al.
IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. IEEE Computer Society, 2022. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2022-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe2

AU - Hemmat, M.

AU - Vergnet, H.

AU - Ferreira, R.

AU - Mangeney, J.

AU - Yu, X.

AU - He, Y.

AU - Liu, Z.

AU - Wang, Q.

AU - Tignon, J.

AU - Baudin, E.

AU - Dhillon, S.

PY - 2022

Y1 - 2022

N2 - PtSe2 is a promising 2D material for the THz range as its bandgap that can be tuned from an indirect semiconductor to a semimetal with the number of atomic layers, unlike other transition metal dichalcogenides. Here we use Terahertz (THz) emission time domain spectroscopy (TDS) to investigate PtSe2 as a function of number of 2D layers. We demonstrate the THz emission from this material for the first time and show that this is a result of second order nonlinear photocurrents in PtSe2, with contributions from photon drag and photogalvanic effects. We also show how the PtSe2 bandstructure dependence on the number of 2D layers radically changes its THz emission properties, rendering PtSe2 a promising material for THz photonics.

AB - PtSe2 is a promising 2D material for the THz range as its bandgap that can be tuned from an indirect semiconductor to a semimetal with the number of atomic layers, unlike other transition metal dichalcogenides. Here we use Terahertz (THz) emission time domain spectroscopy (TDS) to investigate PtSe2 as a function of number of 2D layers. We demonstrate the THz emission from this material for the first time and show that this is a result of second order nonlinear photocurrents in PtSe2, with contributions from photon drag and photogalvanic effects. We also show how the PtSe2 bandstructure dependence on the number of 2D layers radically changes its THz emission properties, rendering PtSe2 a promising material for THz photonics.

UR - http://www.scopus.com/inward/record.url?scp=85139852710&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85139852710&partnerID=8YFLogxK

U2 - 10.1109/IRMMW-THz50927.2022.9895953

DO - 10.1109/IRMMW-THz50927.2022.9895953

M3 - Conference contribution

AN - SCOPUS:85139852710

T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

BT - IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves

PB - IEEE Computer Society

T2 - 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022

Y2 - 28 August 2022 through 2 September 2022

ER -

Hemmat M, Vergnet H, Ferreira R, Mangeney J, Yu X, He Y et al. Ultrafast Terahertz Photocurrents in Semi-metal and semiconductor few monolayer PtSe₂. In IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. IEEE Computer Society. 2022. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/IRMMW-THz50927.2022.9895953