Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials
Among a variety of methods for studying the ultrafast carrier dynamics in the solid-state materials, time-resolved photoemission electron microscopy (PEEM) has been regarded as a unique tool which can simultaneously achieve the femtosecond time resolution as well as non-diffraction-limited lateral s...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/144317 |
| _version_ | 1826118305910358016 |
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| author | Woo, Kyung Chul Xu, Ce Loh, Zhi-Heng |
| author2 | Asian Spectroscopy Conference 2020 |
| author_facet | Asian Spectroscopy Conference 2020 Woo, Kyung Chul Xu, Ce Loh, Zhi-Heng |
| author_sort | Woo, Kyung Chul |
| collection | NTU |
| description | Among a variety of methods for studying the ultrafast carrier dynamics in the solid-state materials, time-resolved photoemission electron microscopy (PEEM) has been regarded as a unique tool which can simultaneously achieve the femtosecond time resolution as well as non-diffraction-limited lateral spatial resolution, hence providing spatiotemporally resolved information on surfaces with structural heterogeneities [1]. When combined with an electron time-of-flight analyzer in the form of a delay-line detector [2], PEEM can be further extended to provide spectroscopic information. The consequent energy-resolved momentum-space images acquired at selected microscopic regions can be mapped, hence permitting the real-time visualization of the evolving photorelaxation dynamics of the band structure of solid-state materials. Here, preliminary spectromicroscopic results obtained from the time-resolved PEEM setup will be presented, and further on-going efforts to build a femtosecond megahertz-repetition-rate extreme ultraviolet radiation source will be introduced. |
| first_indexed | 2024-10-01T04:41:15Z |
| format | Conference Paper |
| id | ntu-10356/144317 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:41:15Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1443172020-10-29T20:11:13Z Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials Woo, Kyung Chul Xu, Ce Loh, Zhi-Heng Asian Spectroscopy Conference 2020 Institute of Advanced Studies Science::Chemistry Photoemission Electron Microscopy Ultrafast Carrier Dynamics Among a variety of methods for studying the ultrafast carrier dynamics in the solid-state materials, time-resolved photoemission electron microscopy (PEEM) has been regarded as a unique tool which can simultaneously achieve the femtosecond time resolution as well as non-diffraction-limited lateral spatial resolution, hence providing spatiotemporally resolved information on surfaces with structural heterogeneities [1]. When combined with an electron time-of-flight analyzer in the form of a delay-line detector [2], PEEM can be further extended to provide spectroscopic information. The consequent energy-resolved momentum-space images acquired at selected microscopic regions can be mapped, hence permitting the real-time visualization of the evolving photorelaxation dynamics of the band structure of solid-state materials. Here, preliminary spectromicroscopic results obtained from the time-resolved PEEM setup will be presented, and further on-going efforts to build a femtosecond megahertz-repetition-rate extreme ultraviolet radiation source will be introduced. Published version 2020-10-28T03:53:49Z 2020-10-28T03:53:49Z 2020 Conference Paper Woo, K. C., Xu, C., & Loh, Z.-H. (2020). Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.55 https://hdl.handle.net/10356/144317 10.32655/ASC_8-10_Dec2020.55 en © 2020 Nanyang Technological University. application/pdf |
| spellingShingle | Science::Chemistry Photoemission Electron Microscopy Ultrafast Carrier Dynamics Woo, Kyung Chul Xu, Ce Loh, Zhi-Heng Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title | Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title_full | Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title_fullStr | Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title_full_unstemmed | Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title_short | Real-time visualization of energy- and momentum-resolved carrier dynamics of spatially heterogeneous materials |
| title_sort | real time visualization of energy and momentum resolved carrier dynamics of spatially heterogeneous materials |
| topic | Science::Chemistry Photoemission Electron Microscopy Ultrafast Carrier Dynamics |
| url | https://hdl.handle.net/10356/144317 |
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