The effect of ion irradiation on dephasing of coherent optical phonons in GaP
The dephasing of coherent longitudinal optical (LO) phonons in ion-irradiated GaP has been investigated with a femtosecond pump-probe technique based on electro-optic sampling. The dephasing time of the coherent LO phonon is found to be dramatically prolonged by the introduction of a small amount of...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2020-10-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0020810 |
| _version_ | 1819207797723627520 |
|---|---|
| author | Takuto Ichikawa Yuta Saito Muneaki Hase |
| author_facet | Takuto Ichikawa Yuta Saito Muneaki Hase |
| author_sort | Takuto Ichikawa |
| collection | DOAJ |
| description | The dephasing of coherent longitudinal optical (LO) phonons in ion-irradiated GaP has been investigated with a femtosecond pump-probe technique based on electro-optic sampling. The dephasing time of the coherent LO phonon is found to be dramatically prolonged by the introduction of a small amount of defects by means of Ga-ion irradiation. The maximum dephasing time observed at room temperature is 9.1 ps at a Ga+ ion dose of 1013/cm2, which is significantly longer than the value of 8.3 ps for GaP before ion irradiation. The longer dephasing time is explained in terms of the suppression of electron-LO-phonon scattering by the presence of defect-induced deep levels. |
| first_indexed | 2024-12-23T05:29:12Z |
| format | Article |
| id | doaj.art-5d5ae643afc54f29ac351df505169319 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-23T05:29:12Z |
| publishDate | 2020-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-5d5ae643afc54f29ac351df5051693192022-12-21T17:58:31ZengAIP Publishing LLCAIP Advances2158-32262020-10-011010105117105117-610.1063/5.0020810The effect of ion irradiation on dephasing of coherent optical phonons in GaPTakuto Ichikawa0Yuta Saito1Muneaki Hase2Department of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, JapanDevice Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, JapanDepartment of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, JapanThe dephasing of coherent longitudinal optical (LO) phonons in ion-irradiated GaP has been investigated with a femtosecond pump-probe technique based on electro-optic sampling. The dephasing time of the coherent LO phonon is found to be dramatically prolonged by the introduction of a small amount of defects by means of Ga-ion irradiation. The maximum dephasing time observed at room temperature is 9.1 ps at a Ga+ ion dose of 1013/cm2, which is significantly longer than the value of 8.3 ps for GaP before ion irradiation. The longer dephasing time is explained in terms of the suppression of electron-LO-phonon scattering by the presence of defect-induced deep levels.http://dx.doi.org/10.1063/5.0020810 |
| spellingShingle | Takuto Ichikawa Yuta Saito Muneaki Hase The effect of ion irradiation on dephasing of coherent optical phonons in GaP AIP Advances |
| title | The effect of ion irradiation on dephasing of coherent optical phonons in GaP |
| title_full | The effect of ion irradiation on dephasing of coherent optical phonons in GaP |
| title_fullStr | The effect of ion irradiation on dephasing of coherent optical phonons in GaP |
| title_full_unstemmed | The effect of ion irradiation on dephasing of coherent optical phonons in GaP |
| title_short | The effect of ion irradiation on dephasing of coherent optical phonons in GaP |
| title_sort | effect of ion irradiation on dephasing of coherent optical phonons in gap |
| url | http://dx.doi.org/10.1063/5.0020810 |
| work_keys_str_mv | AT takutoichikawa theeffectofionirradiationondephasingofcoherentopticalphononsingap AT yutasaito theeffectofionirradiationondephasingofcoherentopticalphononsingap AT muneakihase theeffectofionirradiationondephasingofcoherentopticalphononsingap AT takutoichikawa effectofionirradiationondephasingofcoherentopticalphononsingap AT yutasaito effectofionirradiationondephasingofcoherentopticalphononsingap AT muneakihase effectofionirradiationondephasingofcoherentopticalphononsingap |