Controlling molecular organization at the nanoscale for localized second harmonic generation

I. Berline; L. Douillard; F. Charra; C. Fiorini-Debuisschert

doi:10.1117/12.854872

10 May 2010 Controlling molecular organization at the nanoscale for localized second harmonic generation

I. Berline, L. Douillard, F. Charra, C. Fiorini-Debuisschert

Proceedings Volume 7712, Nanophotonics III; 771236 (2010) https://doi.org/10.1117/12.854872
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Using the electric field present inside a Scanning Tunnelling Microscope (STM) junction, we demonstrate the possibility to create a very local non-centrosymmetry via molecular orientation under the tip. We show this can be used to get localized light emission through second harmonic generation (SHG). Experiments were performed by coupling a femtosecond laser inside a metallic-substrate / metallic-tip junction immersed in concentrated solutions of highly nonlinear azo-dye molecules. The quadratic dependence of the SHG signal intensity with the tip voltage unambiguously shows that it comes from an electric field induced molecular polarisation under the tip. The potentialities of such effects are evoked as an original concept for scanning probe microscopy. Extrapolating the SH intensities that could be recorded, it is estimated that the minimum volume that can be detected in the present experimental configuration is about 1 μm³. In order to be able to decrease this limit, a new experimental set-up is developed towards better signal collection. The implementation of sharp metallic tips to induce amplifying nanoantenna effects (electrostatic lightning rod effects or localized surface plasmon resonances) is also discussed as a complementary way to increase the system lateral resolution.

Citation Download Citation

I. Berline, L. Douillard, F. Charra, and C. Fiorini-Debuisschert "Controlling molecular organization at the nanoscale for localized second harmonic generation", Proc. SPIE 7712, Nanophotonics III, 771236 (10 May 2010); https://doi.org/10.1117/12.854872

ACCESS THE FULL ARTICLE

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: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Molecules

Scanning tunneling microscopy

Second-harmonic generation

Harmonic generation

Gold

Signal processing

Etching

Show All Keywords

Keywords/Phrases

Search In:

Publication Years