Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy
We present recent developments in Raman probe of confined optical and acoustic phonons in nonpolar semiconducting nanowires, with emphasis on Si and Ge. First, a review of the theoretical spatial correlation phenomenological model widely used to explain the downshift and asymmetric broadening to low...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2012/264198 |
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| author | Kofi W. Adu Martin D. Williams Molly Reber Ruwantha Jayasingha Humberto R. Gutierrez Gamini U. Sumanasekera |
| author_facet | Kofi W. Adu Martin D. Williams Molly Reber Ruwantha Jayasingha Humberto R. Gutierrez Gamini U. Sumanasekera |
| author_sort | Kofi W. Adu |
| collection | DOAJ |
| description | We present recent developments in Raman probe of confined optical and acoustic phonons in nonpolar semiconducting nanowires, with emphasis on Si and Ge. First, a review of the theoretical spatial correlation phenomenological model widely used to explain the downshift and asymmetric broadening to lower energies observed in the Raman profile is given. Second, we discuss the influence of local inhomogeneous laser heating and its interplay with phonon confinement on Si and Ge Raman line shape. Finally, acoustic phonon confinement, its effect on thermal conductivity, and factors that lead to phonon damping are discussed in light of their broad implications on nanodevice fabrication. |
| format | Article |
| id | doaj-art-f918f92d11a745b19290e963eff14685 |
| institution | Kabale University |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-f918f92d11a745b19290e963eff146852025-02-03T01:12:41ZengWileyJournal of Nanotechnology1687-95031687-95112012-01-01201210.1155/2012/264198264198Probing Phonons in Nonpolar Semiconducting Nanowires with Raman SpectroscopyKofi W. Adu0Martin D. Williams1Molly Reber2Ruwantha Jayasingha3Humberto R. Gutierrez4Gamini U. Sumanasekera5Physics Department, Altoona College, Pennsylvania State University, Altoona, PA 16601, USADepartment of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USADepartment of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USADepartment of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USAPhysics Department, Pennsylvania State University, University Park, PA 16802, USADepartment of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USAWe present recent developments in Raman probe of confined optical and acoustic phonons in nonpolar semiconducting nanowires, with emphasis on Si and Ge. First, a review of the theoretical spatial correlation phenomenological model widely used to explain the downshift and asymmetric broadening to lower energies observed in the Raman profile is given. Second, we discuss the influence of local inhomogeneous laser heating and its interplay with phonon confinement on Si and Ge Raman line shape. Finally, acoustic phonon confinement, its effect on thermal conductivity, and factors that lead to phonon damping are discussed in light of their broad implications on nanodevice fabrication.http://dx.doi.org/10.1155/2012/264198 |
| spellingShingle | Kofi W. Adu Martin D. Williams Molly Reber Ruwantha Jayasingha Humberto R. Gutierrez Gamini U. Sumanasekera Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy Journal of Nanotechnology |
| title | Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy |
| title_full | Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy |
| title_fullStr | Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy |
| title_full_unstemmed | Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy |
| title_short | Probing Phonons in Nonpolar Semiconducting Nanowires with Raman Spectroscopy |
| title_sort | probing phonons in nonpolar semiconducting nanowires with raman spectroscopy |
| url | http://dx.doi.org/10.1155/2012/264198 |
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