Frequency Modulated Raman Spectroscopy

2018-02-01
Greco, Silvio
Dal Zilio, Simone
Bek, Alpan
Lazzarino, Marco
Naumenko, Denys
The coupling of plasmonic and mechanical properties at the nanoscale is of great potential for the development of next generation devices capable to detect weak forces, mass changes, minute displacements and temperature induced effects. Both the transduction of mechanical motion to the scattered light fields in term of polarization or intensity modulation and plasmon-driven mechanical oscillations have already been demonstrated. Quasi static tunable hot spots have recently been designed and applied to surface-enhanced Raman spectroscopy (SERS). Here we fabricated a plasmo-mechanical device, with a plasmonic hot spot modulated at the oscillator eigenfrequency, and demonstrated that the nonlinear modulation of polarization-dependent SERS signal from a synthetic dye can be analyzed with lock-in techniques, thus, realizing frequency modulated Raman spectroscopy.

Suggestions

Design, fabrication, and characterization of micro thermal actuators
Gülcüler, Buğrahan; Azgın, Kıvanç; Department of Mechanical Engineering (2020-11)
This thesis presents the design, fabrication, and characterization of V-Type thermal actuators, which will be used in an actuator system that is planned to be a tensile and compressive test setup to characterize the expandible cells by the help of double- ended tuning fork resonators as a force sensing mechanism. Actuators are serially packed to increase the generated force by them while maintaining the same deflection values. They have been connected to the overall system by springs to create a force on te...
Terahertz modulation using a bandpass filter combined with a Graphene Supercapacitor
Takan, Taylan; Nebioglu, Mehmet A.; Kakenov, Nurbek; Balci, Osman; KOCABAŞ, COŞKUN; Altan, Hakan (2015-09-22)
Graphene is proving to be an efficient medium for the control of mm-wave/THz radiation. Its electrical and dielectric properties allows it to be incorporated into various existing device architectures. One such application is in the modulation of the amplitude of the propagating THz radiation. Due to its electrical properties this interaction is typically broadband in nature. To make this frequency selective we propose the use of metamaterials or frequency selective surfaces. Generally, these structures per...
Temperature compensation of a capacitive mems accelerometer by using a mems oscillator
Kose, Talha; Azgın, Kıvanç; Akın, Tayfun (2016-02-25)
This study reports a temperature compensation method for a capacitive MEMS accelerometer by using a MEMS double-ended-tuning-fork (DETF) resonator integrated with the accelerometer structure on the same die. The proposed method utilizes the frequency information of the clamped-clamped DETF resonator which is oscillating in a closed-loop operation. In order to compensate the temperature dependence of the accelerometer output, frequency drift of the DETF resonator against changing temperature is used, i. e., ...
IMPLEMENTATION OF STRONG LIGHT-MATTER INTERACTION FOR FABRICATION AND LIGHT MANAGEMENT OF THIN CRYSTAL SILICON SOLAR CELLS
Zolfaghari Borra, Mona; Bek, Alpan; Ünalan, Hüsnü Emrah; Department of Micro and Nanotechnology (2021-7-29)
The integration of photonic components with electrical elements on the same silicon chip may lead to the development of new technologies. One limitation is the space available on the wafer surface, which is restricted. Currently, conventional fabrication techniques produce devices only on the top thin layer of the wafer surface. As a result, new architectural designs are required. Producing functional components deep inside Si without creating damage to the surfaces is a potential technique for overcoming t...
Critical behaviour of the Raman frequency shifts in the vicinity of the lambda-phase transition in NH4Br
Yurtseven, Hasan Hamit (2006-01-01)
This study gives the temperature dependence of the Raman frequencies for the lattice mode of upsilon(7) (TA) and the internal mode of upsilon(2) close to the X-phase transition (T-lambda=234K, P=\) in NB4Br.
Citation Formats
S. Greco, S. Dal Zilio, A. Bek, M. Lazzarino, and D. Naumenko, “Frequency Modulated Raman Spectroscopy,” ACS PHOTONICS, pp. 312–317, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46858.