Influence of whispering gallery modes on light focusing by dielectric circular cylinder
- Авторлар: Kozlov D.A.1,2, Kozlova E.S.1,2, Kotlyar V.V.1,2
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Мекемелер:
- Image Processing Systems Institute—Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences
- Samara National Research University
- Шығарылым: Том 26, № 4 (2017)
- Беттер: 280-288
- Бөлім: Article
- URL: https://journals.rcsi.science/1060-992X/article/view/195026
- DOI: https://doi.org/10.3103/S1060992X17040038
- ID: 195026
Дәйексөз келтіру
Аннотация
In this paper diffraction of a plane monochromatic TE-wave on an ideal homogeneous dielectric cylinder with several resonant wavelength scale radii is analyzed. Two subsequent near-surface maxima of intensity (two focuses) generated at the cylinder output were found on the optical axis. The first subwavelength focus is formed by one of the whispering gallery mode lobes. Its intensity is 50 times the incident light intensity and its full width at the half maximum of the intensity is equal to 0.155 of the incident wavelength. The second focus is two times less in intensity. Its focal spot known as a photonic nanojet is stretched toward the optical axis. The second focus is formed at a distance about the wavelength from the cylinder surface. Its width is equal to 0.44 of the wavelength and its length is two wavelengths. The abilities of light focusing by a two-layered cylinder and influence of materials absorption on the light focusing are also examined by numerical simulation.
Негізгі сөздер
Авторлар туралы
D. Kozlov
Image Processing Systems Institute—Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences; Samara National Research University
Хат алмасуға жауапты Автор.
Email: kozlova.elena.s@gmail.com
Ресей, Samara, 443001; Samara, 443086
E. Kozlova
Image Processing Systems Institute—Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences; Samara National Research University
Email: kozlova.elena.s@gmail.com
Ресей, Samara, 443001; Samara, 443086
V. Kotlyar
Image Processing Systems Institute—Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences; Samara National Research University
Email: kozlova.elena.s@gmail.com
Ресей, Samara, 443001; Samara, 443086
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