Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy
Picosecond carrier dynamics in indium antimonide (InSb) following excitation by below band gap broadband far-infrared radiation was investigated at 200 and 80 K. Using a THz-pump/THz-probe scheme with pump THz fields of 100 kV/cm and an intensity of 100 MW/cm[superscript 2], we observed carrier heat...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51883 https://orcid.org/0000-0001-7804-5418 |
| _version_ | 1811096940165726208 |
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| author | Hoffmann, Matthias C. Hebling, Janos Hwang, Harold Young Yeh, Ka-Lo Nelson, Keith Adam |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Hoffmann, Matthias C. Hebling, Janos Hwang, Harold Young Yeh, Ka-Lo Nelson, Keith Adam |
| author_sort | Hoffmann, Matthias C. |
| collection | MIT |
| description | Picosecond carrier dynamics in indium antimonide (InSb) following excitation by below band gap broadband far-infrared radiation was investigated at 200 and 80 K. Using a THz-pump/THz-probe scheme with pump THz fields of 100 kV/cm and an intensity of 100 MW/cm[superscript 2], we observed carrier heating and impact ionization dynamics. The number of carriers produced exceeds 10[superscript 16] cm[superscript −3], corresponding to a change in carrier density ΔN/N of 700% at 80 K. The onset of a well-defined absorption peak at 1.2 THz is an indication of changes in longitudinal optical (LO) and longitudinal acoustic (LA) phonon populations due to cooling of the hot electrons. |
| first_indexed | 2024-09-23T16:51:47Z |
| format | Article |
| id | mit-1721.1/51883 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:51:47Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/518832022-10-03T08:47:12Z Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy Hoffmann, Matthias C. Hebling, Janos Hwang, Harold Young Yeh, Ka-Lo Nelson, Keith Adam Massachusetts Institute of Technology. Department of Chemistry Nelson, Keith Adam Hoffmann, Matthias C. Hwang, Harold Young Yeh, Ka-Lo Nelson, Keith Adam Picosecond carrier dynamics in indium antimonide (InSb) following excitation by below band gap broadband far-infrared radiation was investigated at 200 and 80 K. Using a THz-pump/THz-probe scheme with pump THz fields of 100 kV/cm and an intensity of 100 MW/cm[superscript 2], we observed carrier heating and impact ionization dynamics. The number of carriers produced exceeds 10[superscript 16] cm[superscript −3], corresponding to a change in carrier density ΔN/N of 700% at 80 K. The onset of a well-defined absorption peak at 1.2 THz is an indication of changes in longitudinal optical (LO) and longitudinal acoustic (LA) phonon populations due to cooling of the hot electrons. Office of Naval Research 2010-03-02T16:41:02Z 2010-03-02T16:41:02Z 2009-04 2009-02 Article http://purl.org/eprint/type/JournalArticle 1550-235X 1098-0121 http://hdl.handle.net/1721.1/51883 Hoffmann, Matthias C. et al. “Impact ionization in InSb probed by terahertz pump terahertz probe spectroscopy.” Physical Review B 79.16 (2009): 161201. © 2009 The American Physical Society https://orcid.org/0000-0001-7804-5418 en_US http://dx.doi.org/10.1103/PhysRevB.79.161201 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Hoffmann, Matthias C. Hebling, Janos Hwang, Harold Young Yeh, Ka-Lo Nelson, Keith Adam Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title | Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title_full | Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title_fullStr | Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title_full_unstemmed | Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title_short | Impact ionization in InSb probed by terahertz pump—terahertz probe spectroscopy |
| title_sort | impact ionization in insb probed by terahertz pump terahertz probe spectroscopy |
| url | http://hdl.handle.net/1721.1/51883 https://orcid.org/0000-0001-7804-5418 |
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