Breakdown of the Selection Rule of Raman Spectra in a Single GaN Nanocolumn

• Mitsui Shintaro

  Department of Physics, Sophia University, Japan

• Kuroe Haruhiko

  Department of Physics, Sophia University, Japan

• Sekine Tomoyuki

  Department of Physics, Sophia University, Japan

• Kikuchi Akihiko

  Department of Electrical and Electronics Engineering, Sophia University, Japan

• Kishino Katsumi

  Department of Electrical and Electronics Engineering, Sophia University, Japan

抄録

We study micro-Raman spectroscopy in free-standing single GaN nanocolumns with 0.45-2.1 μm diameters, which are synthesized by rf-plasma-assisted molecular beam epitaxy. We clearly observe the breakdown of the polarization selection rule of Raman spectra from E₂^H phonon, when the diameter of nanocolumn is thinner than four times the wavelength of incident light inside the sample. The selection rule gets recovered with increasing diameter of nanocolumn. Moreover, we observe quasi-TO phonon modes, which strongly affects the Raman spectra from the A₁(TO) and E₁(TO) phonons. [DOI: 10.1380/ejssnt.2012.321]

収録刊行物

• e-Journal of Surface Science and Nanotechnology

  e-Journal of Surface Science and Nanotechnology 10 (0), 321-324, 2012

  公益社団法人 日本表面真空学会

キーワード

• Raman scattering spectroscopy
• Phonons
• Gallium nitride
• Nanocolumns

詳細情報

• CRID: 1390282680162298880
• NII論文ID: 130004438814
• DOI: 10.1380/ejssnt.2012.321
• ISSN: 13480391
• Web Site: https://www.jstage.jst.go.jp/article/ejssnt/10/0/10_321/_pdf
• 本文言語コード: en
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• 抄録ライセンスフラグ: 使用不可