Growth of nonpolar and semi-polar GaN and GaN-based structures offers the opportunity to reduce quantum confined Stark effect and possibly increase indium incorporation, as compared to polar structures, for enhanced performance in green and longer wavelength light emitters. However, the development of the nonpolar and semi-polar GaN growth is hampered by the lack of suitable substrates. Silicon, despite its large thermal-expansion and lattice mismatch with GaN, provides the advantages of the availability of large-size wafers with high crystalline quality at low cost, good electrical conductivity, and feasibility of its removal through chemical etching for better light extraction and heat transfer. In this article, we overview the recent progress in epitaxial growth of nonpolar and semi-polar GaN-based structures on patterned Si substrates. Also discussed are structural and optical properties of the resulting material.
K. Ding, V. Avrutin, N. Izyumskaya, S. Metzner, F. Bertram, J. Christen, U. Ozgur, and H. Morkoc, "Recent progress in nonpolar and semi-polar GaN light emitters on patterned Si substrates," Proc. SPIE 10532, Gallium Nitride Materials and Devices XIII, 1053208 (Presented at SPIE OPTO: January 29, 2018; Published: 23 February 2018); https://doi.org/10.1117/12.2291281.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.