Controlling and utilizing optical forces at the nanoscale with plasmonic antennas

被引:3
|
作者
Lovera, Andrea [1 ]
Martin, Olivier J. F. [1 ]
机构
[1] Swiss Fed Inst Technol Lausanne EPFL, Nanophoton & Metrol Lab, CH-1015 Lausanne, Switzerland
来源
OPTICAL TRAPPING AND OPTICAL MICROMANIPULATION VIII | 2011年 / 8097卷
关键词
Plasmonic trapping; sensing; plasmonic dipole antenna; surface-enhanced Raman spectroscopy; microfluidics; ENHANCED RAMAN-SPECTROSCOPY; DIPOLE ANTENNAS; NANOPARTICLES; SCATTERING;
D O I
10.1117/12.892731
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Plasmonic dipole antennas are powerful optical devices for many applications since they combine a high field enhancement with outstanding tunability of their resonance frequency. The field enhancement, which is mainly localized inside the nanogap between both arms, is strong enough to generate attractive forces for trapping extremely small objects flowing nearby. Furthermore it dramatically enhances their Raman scattering cross-section generating SERS emission. In this publication, we demonstrate how plasmonic antennas provide unique means for bringing analyte directly into hot-spots by merely controlling the optical force generated by the plasmon resonance. This technique is very suitable for immobilizing objects smaller that the diffraction limit and requires a very little power density. In this work, 20nm gold nanoparticles functionalized with Rhodamine 6G are trapped in the gap of nanoantennas fabricated with e-beam lithography on glass substrate. The entire system is integrated into a microfluidic chip with valves and pumps for driving the analyte. The field enhancement is generated by a near-IR laser (lambda=808nm) that provides the trapping energy. It is focused on the sample through a total internal reflection (TIRF) objective in dark field configuration with a white light source. The scattered light is collected through the same objective and the spectrum of one single antenna spectrum is recorded and analyzed every second. A trapping event is characterized by a sudden red-shift of the antenna resonance. This way, it is possible to detect the trapping of extremely small objects. The SERS signal produced by a trapped analyte can then be studied by switching from the white light source to a second laser for Raman spectroscopy, while keeping the trapping laser on. The trapping and detection limit of this approach will be discussed in detail.
引用
收藏
页数:6
相关论文
共 50 条
  • [21] Utilizing of anisotropic plasmonic arrays for analytics
    Cialla, D.
    Petschulat, J.
    Huebner, U.
    Schneidewind, H.
    Zeisberger, M.
    Mattheis, R.
    Pertsch, T.
    Moeller, R.
    Popp, J.
    BIOPHOTONICS: PHOTONIC SOLUTIONS FOR BETTER HEALTH CARE II, 2010, 7715
  • [22] Plasmonic Interactions and Optical Forces between Au Bipyramidal Nanoparticle Dimers
    Nome, Rene A.
    Guffey, Mason J.
    Scherer, Norbert F.
    Gray, Stephen K.
    JOURNAL OF PHYSICAL CHEMISTRY A, 2009, 113 (16): : 4408 - 4415
  • [23] Enhanced Optical Forces by Hybrid Long-Range Plasmonic Waveguides
    Chen, Lin
    Zhang, Tian
    Li, Xun
    JOURNAL OF LIGHTWAVE TECHNOLOGY, 2013, 31 (21) : 3432 - 3438
  • [24] Optical Forces on Silver Homogeneous Nanotubes: Study of Shell Plasmonic Interaction
    Ekeroth, R. M. Abraham
    Lester, M. F.
    PLASMONICS, 2015, 10 (04) : 989 - 998
  • [25] Strong plasmonic enhancement of single molecule photostability in silver dimer optical antennas
    Kaminska, Izabela
    Vietz, Carolin
    Cuartero-Gonzalez, Alvaro
    Tinnefeld, Philip
    Fernandez-Dominguez, Antonio I.
    Acuna, Guillermo P.
    NANOPHOTONICS, 2018, 7 (03) : 643 - 649
  • [26] Near-field optical response of periodically arrayed plasmonic nanogap antennas
    Sakai, Kyosuke
    Nomura, Kensuke
    Tanaka, Yoshito
    Sasaki, Keiji
    JOURNAL OF APPLIED PHYSICS, 2013, 114 (02)
  • [27] Optical antennas with multiple plasmonic nanoparticles for tip-enhanced Raman microscopy
    Taguchi, Atsushi
    Yu, Jun
    Verma, Prabhat
    Kawata, Satoshi
    NANOSCALE, 2015, 7 (41) : 17424 - 17433
  • [28] Nonlinear properties of nanoscale antennas
    Suh, Jae Yong
    Odom, Teri W.
    NANO TODAY, 2013, 8 (05) : 469 - 479
  • [29] Light on the Tip of a Needle: Plasmonic Nanofocusing for Spectroscopy on the Nanoscale
    Berweger, Samuel
    Atkin, Joanna M.
    Olmon, Robert L.
    Raschke, Markus B.
    JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2012, 3 (07): : 945 - 952
  • [30] Si@Au Core-Shell Nanostructures: Toward a New Platform for Controlling Optical Properties at the Nanoscale
    Chaabani, Wajdi
    Proust, Julien
    Ouellet, Samuel
    Movsesyan, Artur
    Beal, Jeremie
    Bachelot, Renaud
    Xu, Tao
    Baudrion, Anne-Laure
    Adam, Pierre-Michel
    Boudreau, Denis
    Chehaidar, Abdallah
    Plain, Jerome
    JOURNAL OF PHYSICAL CHEMISTRY C, 2021, 125 (37): : 20606 - 20616