A micromechanical switchable hot spot for SERS applications

Download

index.pdf

Date

2016-09-26

Author

Naumenko, Denys
Toffoli, Valeria
Greco, Silvio
Dalzilio, Simone
Bek, Alpan
Lazzarino, Marco

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

90
views

0
downloads

Hot spots are defined as nanostructures of noble metal able to locally enhance the electromagnetic field of several orders of magnitude and to confine this effect to a region for several orders of magnitude smaller than the light wavelength. Hot spots are particularly important for the surface enhanced Raman spectroscopy applications, in which the field enhancement is used to amplify the usually weak Raman scattering signal. The hot spots are mostly generated between two or more plasmonic nanostructures separated by nanometric gaps. Several strategies are used to design and realize the hot spots, both in solution, using the noble metal nanoparticles, and on surfaces, using nanolithography and evaporation. In this paper, we demonstrated the fabrication of a nanomechanical plasmonic device for Raman spectroscopy, in which the hot spots are switched on when biased at the resonant frequency and switched off when the actuation signal is removed. Published by AIP Publishing.

Subject Keywords

Enhanced raman-scattering, Impact oscillator, Nanoparticles, Surface, Localization, Molecules, Pillars, Systems, Gold

URI

https://hdl.handle.net/11511/46939

Journal

APPLIED PHYSICS LETTERS

DOI

https://doi.org/10.1063/1.4964123

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Development of SERS-active silver nanowire filter foils for pathogen detection in fluids Oğuz, Hilal; Bek, Alpan; Son, Çağdaş Devrim; Department of Micro and Nanotechnology (2022-2) In this study, the signal enhancement in the vicinity of metal nanowires was investigated by using a specific spectroscopic technique called surface-enhanced Raman scattering (SERS). When laser light interacts with roughened or nanostructured metallic surfaces, the interaction causes an increase in electromagnetic field in Raman spectra due to the excitation of surface plasmons in metallic nanostructures. This several orders of signal enhancement provides sensitive detection limits of extremely small amoun...
Determination of optical parameters of Ga0.75In0.25Se layered crystals IŞIK, MEHMET; Hasanlı, Nızamı (2012-05-01) The optical properties of the Ga0.75In0.25Se crystals have been investigated by means of transmission and reflection measurements in the wavelength range of 380-1100 nm. The analysis of the results performed at room temperature revealed the presence of optical indirect transtions with band gap energy of 1.89 eV. The variation of the band gap energy as a function of temperature was also studied in the temperature range of 10-300 K. The rate of change of band gap energy (? = 6.2 x 10(4) eV/K) and absolute zer...
A Numerical Model for Investigating the Effect of Rough Surface Parameters on Radar Cross Section Statistics Kuzuoğlu, Mustafa (2017-07-14) Electromagnetic scattering from rough surfaces is modeled by combining the periodic finite element method and the transformation electromagnetics approach. The behavior of the radar cross section (RCS) at both specular and backscattering directions is analyzed as a function of rms height and correlation length with the help of Monte Carlo simulations. The concept of backscattering enhancement is illustrated, and some conclusions are drawn about the RCS statistics.
A Novel Dual-band Metamaterial Structure Ekmekci, E.; Turban-Sayan, G. (2009-08-21) In this study, we propose a novel metamaterial structure having magnetic resonances at two different frequencies and hence providing negative effective permeability values over two separate bandwidths. The introduced metamaterial unit cell topology in this paper is made of a single loop of conducting strip printed over a dielectric substrate with a special winding geometry. Transmission and reflection spectra of this unit cell are simulated using the Ansoft's HFSS software to observe its resonance frequenci...
High Conversion Efficiency InP/InGaAs Strained Quantum Well Infrared Photodetector Focal Plane Array With 9.7 mu m Cut-Off for High-Speed Thermal Imaging Eker, Suleyman Umut; Arslan, Yetkin; Onuk, Ahmet Emre; Beşikci, Cengiz (Institute of Electrical and Electronics Engineers (IEEE), 2010-02-01) InP/InGaAs material system is an alternative to AlGaAs/GaAs for long wavelength quantum well infrared photodetectors (QWIPs). We demonstrate a large format (640 x 512) QWIP focal plane array (FPA) constructed with the strained InP/InGaAs material system. The strain introduced to the structure through utilization of In0.48Ga0.52As (instead of In0.53Ga0.47As) as the quantum well material shifts the cut-off wavelength from similar to 8.5 to 9.7 mu m. The FPA fabricated with the 40-well epilayer structure yield...

Citation Formats

D. Naumenko, V. Toffoli, S. Greco, S. Dalzilio, A. Bek, and M. Lazzarino, “A micromechanical switchable hot spot for SERS applications,” APPLIED PHYSICS LETTERS, pp. 0–0, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46939.