Radiation properties of sources inside an opal structure modified by changing the incident angle of pump light

• Published in: Optics communications Vol. 279; no. 2; pp. 390 - 394
• Main Authors: Li, Jingjuan, Xiong, Zhigang, Li, Zhiyuan, Zhang, Daozhong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.11.2007; Elsevier Science
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Opal structure; Optical materials; Optics; Photonic band gap; Photonic bandgap materials; Photonic crystal; Physics; Stimulated emission; Photonic band gap; Stimulated emission; Photonic crystal; Opal structure; 42.70.Qs; 33.20.−t; 78.45.+h; Output power; Three dimensional structure; 42.70.Qs; 78.45.+h; 33.20.-t; Photonic crystal; Photonic band gap; Stimulated emission; Opal structure; Emission spectra; Oblique incidence; Photonic crystals; Opals; Incidence angle
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2007.07.051

In this paper we discuss the strong incident angle dependence of the modification of emission in an opal structure. We study the emission with oblique incidence and find that we can control the emission properties, such as emission intensity and spectral width, just by changing the incident angle of pump light. Calculations with varying incident angles show that the band gap of the structure blue shifts with the increase of incident angle and the emission power of embedded sources is strongly determined by this gap change. In addition, the photonic band gap determines the emission spectrum. With the incident angle increasing, the width of emission spectrum increases first and then decreases.