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Title: Ultrafast carrier dynamics and optical pumping of lasing from Ar-plasma treated ZnO nanoribbons

Abstract

We report that it is a well-known fact that ZnO has been one of the most studied wide bandgap II-VI materials by the scientific community specifically due to its potential for being used as exciton-related optical devices. Hence, realizing ways to increase the efficiency of these devices is important. We discuss a plasma treatment technique to enhance the near-band-edge (NBE) excitonic emission from ZnO based nanoribbons. We observed an enhancement of the NBE peak and simultaneous quenching of the visible emission peak resulting from the removal of surface traps on these ZnO nanoribbons. More importantly, we report here the associated ultrafast carrier dynamics resulting from this surface treatment. Femtosecond transient absorption spectroscopy was performed using pump-probe differential transmission measurements shedding new light on these improved dynamics with faster relaxation times. The knowledge obtained is important for improving the application of ZnO based optoelectronic devices. Finally, we also observed how these improved carrier dynamics have a direct effect on the threshold and efficiency of random lasing from the material.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [2];  [2];  [3];  [4]
  1. Univ. of Illinois, Chicago, IL (United States).Department of Electrical and Computer Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  3. Univ. of Illinois, Chicago, IL (United States).Department of Electrical and Computer Engineering, Department of Physics, and Department of Bioengineering
  4. Univ. of Illinois, Chicago, IL (United States).Department of Electrical and Computer Engineering and Department of Physics
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1427726
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nanotechnology
Additional Journal Information:
Journal Volume: 29; Journal Issue: 9; Journal ID: ISSN 0957-4484
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; zinc oxide; near-band-edge emission; plasma etching; carrier dynamics; lasing

Citation Formats

Sarkar, Ketaki, Mukherjee, Souvik, Wiederrecht, Gary, Schaller, Richard D., Gosztola, David J., Stroscio, Michael A., and Dutta, Mitra. Ultrafast carrier dynamics and optical pumping of lasing from Ar-plasma treated ZnO nanoribbons. United States: N. p., 2018. Web. https://doi.org/10.1088/1361-6528/aaa530.
Sarkar, Ketaki, Mukherjee, Souvik, Wiederrecht, Gary, Schaller, Richard D., Gosztola, David J., Stroscio, Michael A., & Dutta, Mitra. Ultrafast carrier dynamics and optical pumping of lasing from Ar-plasma treated ZnO nanoribbons. United States. https://doi.org/10.1088/1361-6528/aaa530
Sarkar, Ketaki, Mukherjee, Souvik, Wiederrecht, Gary, Schaller, Richard D., Gosztola, David J., Stroscio, Michael A., and Dutta, Mitra. Thu . "Ultrafast carrier dynamics and optical pumping of lasing from Ar-plasma treated ZnO nanoribbons". United States. https://doi.org/10.1088/1361-6528/aaa530. https://www.osti.gov/servlets/purl/1427726.
@article{osti_1427726,
title = {Ultrafast carrier dynamics and optical pumping of lasing from Ar-plasma treated ZnO nanoribbons},
author = {Sarkar, Ketaki and Mukherjee, Souvik and Wiederrecht, Gary and Schaller, Richard D. and Gosztola, David J. and Stroscio, Michael A. and Dutta, Mitra},
abstractNote = {We report that it is a well-known fact that ZnO has been one of the most studied wide bandgap II-VI materials by the scientific community specifically due to its potential for being used as exciton-related optical devices. Hence, realizing ways to increase the efficiency of these devices is important. We discuss a plasma treatment technique to enhance the near-band-edge (NBE) excitonic emission from ZnO based nanoribbons. We observed an enhancement of the NBE peak and simultaneous quenching of the visible emission peak resulting from the removal of surface traps on these ZnO nanoribbons. More importantly, we report here the associated ultrafast carrier dynamics resulting from this surface treatment. Femtosecond transient absorption spectroscopy was performed using pump-probe differential transmission measurements shedding new light on these improved dynamics with faster relaxation times. The knowledge obtained is important for improving the application of ZnO based optoelectronic devices. Finally, we also observed how these improved carrier dynamics have a direct effect on the threshold and efficiency of random lasing from the material.},
doi = {10.1088/1361-6528/aaa530},
journal = {Nanotechnology},
number = 9,
volume = 29,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
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Figures / Tables:

Figure 1. Figure 1.: Schematic of the growth set up of ZnO nanoribbons.

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    Works referencing / citing this record:

    Improved Optical Property and Lasing of ZnO Nanowires by Ar Plasma Treatment
    journal, September 2019


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