Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies
Picosecond ultrasonics was used to study the photoelastic properties of zinc-blende (cubic) c-AlₓGa₁₋ₓN with x around 0.5 The velocities for longitudinal sound in the alloys were measured using ultrafast UV pump-probe experiments with (AlGa)N membranes. Strong Brillouin oscillations wer...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | https://eprints.nottingham.ac.uk/50127/ |
| _version_ | 1848798162072895488 |
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| author | Whale, Josh Akimov, Andrey V. Novikov, Sergei V. Mellor, Christopher J. Kent, Anthony J. |
| author_facet | Whale, Josh Akimov, Andrey V. Novikov, Sergei V. Mellor, Christopher J. Kent, Anthony J. |
| author_sort | Whale, Josh |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Picosecond ultrasonics was used to study the photoelastic properties of zinc-blende (cubic) c-AlₓGa₁₋ₓN with x around 0.5 The velocities for longitudinal sound in the alloys were measured using ultrafast UV pump-probe experiments with (AlGa)N membranes. Strong Brillouin oscillations were observed in the (AlGa)N films attached to GaAs substrates. These oscillations are due to the dynamical interference of the probe beams reflected from the sample surface and interfaces and a picosecond-duration strain pulse propagating in the alloy layer. Optical and elasto-optical parameters including the complex refractive index and the fundamental band gap of the cubic nitride alloys are determined and compared with the values obtained by ellipsometry. |
| first_indexed | 2025-11-14T20:15:23Z |
| format | Article |
| id | nottingham-50127 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:15:23Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-501272018-04-27T08:46:02Z https://eprints.nottingham.ac.uk/50127/ Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies Whale, Josh Akimov, Andrey V. Novikov, Sergei V. Mellor, Christopher J. Kent, Anthony J. Picosecond ultrasonics was used to study the photoelastic properties of zinc-blende (cubic) c-AlₓGa₁₋ₓN with x around 0.5 The velocities for longitudinal sound in the alloys were measured using ultrafast UV pump-probe experiments with (AlGa)N membranes. Strong Brillouin oscillations were observed in the (AlGa)N films attached to GaAs substrates. These oscillations are due to the dynamical interference of the probe beams reflected from the sample surface and interfaces and a picosecond-duration strain pulse propagating in the alloy layer. Optical and elasto-optical parameters including the complex refractive index and the fundamental band gap of the cubic nitride alloys are determined and compared with the values obtained by ellipsometry. American Physical Society 2018-03-29 Article PeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/50127/8/PhysRevMaterials.2.034606.pdf Whale, Josh, Akimov, Andrey V., Novikov, Sergei V., Mellor, Christopher J. and Kent, Anthony J. (2018) Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies. Physical Review Materials, 2 (3). 034606. ISSN 2475-9953 https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.2.034606 doi:10.1103/PhysRevMaterials.2.034606 doi:10.1103/PhysRevMaterials.2.034606 |
| spellingShingle | Whale, Josh Akimov, Andrey V. Novikov, Sergei V. Mellor, Christopher J. Kent, Anthony J. Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title | Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title_full | Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title_fullStr | Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title_full_unstemmed | Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title_short | Photoelastic properties of zinc-blende (AlGa)N in the UV: picosecond ultrasonic studies |
| title_sort | photoelastic properties of zinc-blende (alga)n in the uv: picosecond ultrasonic studies |
| url | https://eprints.nottingham.ac.uk/50127/ https://eprints.nottingham.ac.uk/50127/ https://eprints.nottingham.ac.uk/50127/ |