Date:

2025-04-30

Title of Paper:

Wall thickness dependent double optical bistability in gold nanotube: A physical mechanism based on local field enhancement

Journal:

JOURNAL OF APPLIED PHYSICS

Summary:

The intrinsic optical bistability
OB in a two-phase composite, a nonlinear gold nanotube
embedded in a linear dielectric host, is investigated by theoretical calculation. Based on quasistatic
approximation and Kerr nonlinearity, we obtain the local electric field in a certain position of the
gold nanotube as a function of the incident field. In addition to the single OB, the appearance of
double OB and optical tristability are also reported. It is shown that both wavelength and wall
thickness can dramatically affect the optical bistable behavior of gold nanotube. Both the critical
wavelength and the region of double OB decrease obviously with increasing the wall thickness.
Thus double OB only appears in the thinner gold tube and is absent as the wall thickness exceeds
the critical value. Furthermore, all these OB characteristics have been explained by the local field
enhancement effect. © 2009 American Institute of Physics. DOI: 10.1063/1.3142395

Co-author:

Jian Zhu, Hai Liu, Li-Qing Huang

Volume:

105(11)

Page Number:

114319

Translation or Not:

No

Date of Publication:

2009-06-10