Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Investigation of mode characteristics for a square cavity with a pedestal by a three-dimensional finite-difference time-domain technique

Not Accessible

Your library or personal account may give you access

Abstract

Mode characteristics of a strongly confined square cavity suspended in air via a pedestal on the substrate are investigated by a three-dimensional finite-difference time-domain technique. The mode wavelengths and mode quality factors (Q factors) are calculated as the functions of the size of the pedestal and the slope angle θ of the sidewalls of the square slab, respectively. For the square slab with side length of 2μm, thickness of 0.2μm, and refractive index of 3.4, on a square pedestal with refractive index of 3.17, the Q factor of the whispering-gallery (WG)-like mode transverse-electric TE(3,5)o first increases with the side length b of the square pedestal and then quickly decreases as b>0.4μm, but the Q factor of the WG-like mode TE(4,6)o drops down quickly as b>0.2μm, owing to their different symmetries. The results indicate that the pedestal can also result in mode selection in the WG-like modes. In addition, the numerical results show that the Q factors decrease 50% as the slope angle of the sidewalls varies from 90° to 80°. The mode characteristics of WG-like modes in the square cavity with a rectangular pedestal are also discussed. The results show that the nonsquare pedestal largely degrades the WG-like modes.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Investigation of mode characteristics for microdisk resonators by S-matrix and three-dimensional finite-difference time-domain technique

Xian-Shu Luo, Yong-Zhen Huang, Wei-Hua Guo, Qin Chen, Miao-Qing Wang, and Li-Juan Yu
J. Opt. Soc. Am. B 23(6) 1068-1073 (2006)

Design of quantum cascade microcavity lasers based on Q factor versus etching depth

Jing Li, Yue-De Yang, and Yong-Zhen Huang
J. Opt. Soc. Am. B 26(8) 1484-1491 (2009)

Spectral shift and Q change of circular and square-shaped optical microcavity modes due to periodic sidewall surface roughness

Svetlana V. Boriskina, Trevor M. Benson, Phillip Sewell, and Alexander I. Nosich
J. Opt. Soc. Am. B 21(10) 1792-1796 (2004)

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 Optica member, or as an authorized user of your institution.

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

Figures (4)

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

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

Tables (1)

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

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

Equations (2)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved