Abstract

We report theoretical simulations on the photonic nanojet (PNJ) of single dielectric microspheres of various sizes illuminated by focused Gaussian beams (FGBs), using analytical theory developed by Gouesbet et al. based on the Bromwich formalism. The radius of the microsphere ($R$) is varied from 1 to 45 µm. The effect of the beam waist (${\omega _0}$) on characteristic parameters such as maximum electric field enhancement (${\eta _{\rm max}}$) of the PNJ, the focal length of the microsphere ($f$), effective length, and width of the PNJ is studied in detail. The effect of the refractive index of the microsphere (${n_p}$) and $R$ on the ${\eta _{\rm max}}$ for different values of ${\omega _0}$ is studied. The dependence of (i) the $f$ value on $R$ and (ii) the ${\eta _{\rm max}}$ value on $\lambda $ is investigated systematically.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Photonic nanojet calculations in layered radially inhomogeneous micrometer-sized spherical particles

Yuri E. Geints, Alexander A. Zemlyanov, and Ekaterina K. Panina
J. Opt. Soc. Am. B 28(8) 1825-1830 (2011)

Spatial control of photonic nanojets

Jinlong Zhu and Lynford L. Goddard
Opt. Express 24(26) 30444-30464 (2016)

Ultralong photonic nanojet formed by dielectric microtoroid structure

Baifu Zhang, Jingjing Hao, Zhe Shen, Heng Wu, Kang Zhu, Ji Xu, and Jianping Ding
Appl. Opt. 57(28) 8331-8337 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (15)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription