Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures
We demonstrate subwavelength imaging and control of localized near-field distribution under resonant and off-resonant excitation of identical gold bowtie nanostructures through photoemission electron microscopy. Control of the near-field distribution was realized by polarization rotation of single f...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/18/9/093046 |
| _version_ | 1797750964471463936 |
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| author | Boyu Ji Jiang Qin Haiyan Tao Zuoqiang Hao Jingquan Lin |
| author_facet | Boyu Ji Jiang Qin Haiyan Tao Zuoqiang Hao Jingquan Lin |
| author_sort | Boyu Ji |
| collection | DOAJ |
| description | We demonstrate subwavelength imaging and control of localized near-field distribution under resonant and off-resonant excitation of identical gold bowtie nanostructures through photoemission electron microscopy. Control of the near-field distribution was realized by polarization rotation of single femtosecond laser pulse and variation of the phase delay of two orthogonally polarized femtosecond laser pulses. We show that the localized optical near-field distribution can be well controlled either among the corners of the nano-prisms in the bowtie for resonant excitation or the edges for off-resonant excitation. A better visualization of the PEEM image is achieved for resonant excitation than in the case of off-resonant excitation. The experimental results of the optical near-field distribution control are well reproduced by finite-difference time-domain simulations and understood by linear combination of electric charge distribution of the bowtie by s - and p - polarized light illumination. In addition, a shift of the near-field excitation position with inverted or unchanged phase, alternatively an un-shift of the excitation position but only with inverted phase of the near-field, can be realized by rotating the polarization angle of a single pulse and coherent control of two orthogonally polarized fs laser pulses. |
| first_indexed | 2024-03-12T16:40:28Z |
| format | Article |
| id | doaj.art-6192f6e3151a46bd808a518b531de783 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:40:28Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-6192f6e3151a46bd808a518b531de7832023-08-08T14:31:24ZengIOP PublishingNew Journal of Physics1367-26302016-01-0118909304610.1088/1367-2630/18/9/093046Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructuresBoyu Ji0Jiang Qin1Haiyan Tao2Zuoqiang Hao3Jingquan Lin4School of Science, Changchun University of Science and Technology , Changchun 130022, People’s Republic of ChinaSchool of Science, Changchun University of Science and Technology , Changchun 130022, People’s Republic of ChinaSchool of Science, Changchun University of Science and Technology , Changchun 130022, People’s Republic of ChinaSchool of Science, Changchun University of Science and Technology , Changchun 130022, People’s Republic of ChinaSchool of Science, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; International Research Center for Nano Handling and Manufacturing of China, Changchun 130022, People’s Republic of ChinaWe demonstrate subwavelength imaging and control of localized near-field distribution under resonant and off-resonant excitation of identical gold bowtie nanostructures through photoemission electron microscopy. Control of the near-field distribution was realized by polarization rotation of single femtosecond laser pulse and variation of the phase delay of two orthogonally polarized femtosecond laser pulses. We show that the localized optical near-field distribution can be well controlled either among the corners of the nano-prisms in the bowtie for resonant excitation or the edges for off-resonant excitation. A better visualization of the PEEM image is achieved for resonant excitation than in the case of off-resonant excitation. The experimental results of the optical near-field distribution control are well reproduced by finite-difference time-domain simulations and understood by linear combination of electric charge distribution of the bowtie by s - and p - polarized light illumination. In addition, a shift of the near-field excitation position with inverted or unchanged phase, alternatively an un-shift of the excitation position but only with inverted phase of the near-field, can be realized by rotating the polarization angle of a single pulse and coherent control of two orthogonally polarized fs laser pulses.https://doi.org/10.1088/1367-2630/18/9/093046nanostructuresphotoemission electron microscopenear-field controllocalized surface plasmons |
| spellingShingle | Boyu Ji Jiang Qin Haiyan Tao Zuoqiang Hao Jingquan Lin Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures New Journal of Physics nanostructures photoemission electron microscope near-field control localized surface plasmons |
| title | Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures |
| title_full | Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures |
| title_fullStr | Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures |
| title_full_unstemmed | Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures |
| title_short | Subwavelength imaging and control of ultrafast optical near-field under resonant- and off-resonant excitation of bowtie nanostructures |
| title_sort | subwavelength imaging and control of ultrafast optical near field under resonant and off resonant excitation of bowtie nanostructures |
| topic | nanostructures photoemission electron microscope near-field control localized surface plasmons |
| url | https://doi.org/10.1088/1367-2630/18/9/093046 |
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