Dr. Zhiwen Kang Profile

Dr. Zhiwen Kang

at Chinese Univ of Hong Kong

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 10 October 2012 Paper

Plasmonic optical trapping of metal nanoparticles for SERS by utilizing gold nano-ring structure

Zhiwen Kang, Ho-Pui Ho

Proceedings Volume 8458, 84583A (2012) https://doi.org/10.1117/12.930931

KEYWORDS: Gold, Nanoparticles, Plasmonics, Optical tweezers, Metals, Finite-difference time-domain method, Surface plasmons, Particles, Near field, Neodymium

Read Abstract +

The derivate of surface plasmon and optical tweezers, so-called plasmonic nano-optical tweezers (PNOT), has attracted much research interest due to its powerful ability for immobilizing nano-objects in the nanoscale, and its potential application in chemo/biosensing and life science. In this work, we use gold nano-rings to construct PNOT, and demonstrate the feasibility to trap metal nanoparticles (Au-NPs) for SERS application from the numerical standpoint. 3D finite-difference time-domain (FDTD) and the Maxwell stress tensor (MST) were used in our simulation study. We show that the interactions of the localized surface plasmon (LSP) excitation and the plasmonic interferences of the nano-ring arrays contribute to a narrow spectral feature around 785 nm, resulting in strong local near-field enhancement and thus intensive field gradient forces. The trapping potential well is as high as 1.31×10^-19 J under a low illuminating power density of 1.0 mW/μm², which makes the trapping events effective enough to overcome Brownian motion of the Au-NPs. Moreover, the existence of multiple potential wells results in a very large active volume of ~106 nm3 for trapping the target particles. The trapped Au-NPs further lead to the formation of nano-gaps that offer a field enhancement of 160 times. Our proposal shows promising applications for sensing and microfluidic integrations.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years