Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Microwave-assisted in situ laser dye incorporation into high sensitivity whispering gallery mode microresonators
Download
Mondragón-Ochoa_2022_J._Phys._D__Appl._Phys._55_055101.pdf
Date
2022-02-01
Author
Mondragon-Ochoa, Jesus S.
Gonzalez-Rivera, Jose
Toparlı, Çiğdem
Khanum, Rizwana
Moirangthem, Rakesh S.
Duce, Celia
Ferrari, Carlo
Barillaro, Giuseppe
Erbe, Andreas
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
56
views
3
downloads
Cite This
Optical whispering gallery mode microresonators (WGM-mu Rs) are powerful sensitive components with many analytical applications. Here, spherical WGM-mu Rs have been synthesised in a single-step microwave (MW)-assisted heterophase polymerisation. The microresonators are based on poly(styrene) beads into which the organic lasing dye nile red was incorporated as gain medium in situ during the polymerisation. The particle diameter and diameter distribution of the synthesised particles were tuned in the range of around 200 nm up to 50 mu m by adjusting the concentration between stabiliser poly-(N-vinyl pyrrolidone) (PVP) and monomer styrene, and the solvent composition in the dispersion process. Lower water content enabled the synthesis of spherical particles with large size polydispersity, from which WGM-mu Rs with a variety of diameters were selected. Microspheres with diameters greater than or similar to 3.5 mu < mu W were sufficient to excite WGMs. WGM shifts of beads with diameter between approximate to 5 and 30 mu m measured in air and water show a sensitivity up to 54 nm/RIU for the smallest particles. Dye doped WGM-mu R in the low mu m size range obtained by the MW-assisted polymerisation process with its versatility, low processing times and high yields opens new horizons for the applications of these systems as sensors.
Subject Keywords
whispering gallery mode
,
morphology-dependent resonances
,
laser
,
polymerisation
,
microwave
,
refractive index sensing
,
MONODISPERSE POLYSTYRENE MICROSPHERES
,
DISPERSION POLYMERIZATION
,
NANOPARTICLES
URI
https://hdl.handle.net/11511/95179
Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
DOI
https://doi.org/10.1088/1361-6463/ac2e34
Collections
Department of Metallurgical and Materials Engineering, Article
Suggestions
OpenMETU
Core
Integrated optical modulators with zero index metamaterials based on photonic crystal slab waveguides
Yildirim, Mustafa; GÖVDELİ, ALPEREN; Kocaman, Serdar (2019-01-01)
A novel integrated optical modulator design is presented using zero index metamaterial-based Mach-Zehnder Interferometer with photonic crystal phase shifters. The phase modulation relies on the shift between the photonic bandgaps having non-zero and zero effective refractive indices. A small change in the bulk index results in an effective index change between the arms of the MZI due to the disturbance of the band structure. Thus, such a structure provides a new approach for phase modulation on integrated o...
Alternative design of left-handed metamaterial based on circular resonator and wire strip for waveguide configurations with sensing and absorber applications
Gunduz, Ozan T.; Sabah, Cumali (2015-08-01)
An alternative design of left-handed (LH) metamaterial (MTM) for waveguide configurations is presented with sensor and absorber applications. The LH structure is based on two identical circular ring resonators connected with a wire strip. Both simulation and experimental results show that the planar MTM has an LH resonance at similar to 9.9 GHz. Surface current and magnetic field distributions at the resonance are also presented to show the LH behavior of the structure in detail. In addition, a parametric s...
Noise analysis and characterization of a sigma-delta/capacitive microaccelerometer
Külah, Haluk; Yazdi, N; Najafi, K (2006-02-01)
This paper reports a high-sensitivity low-noise capacitive accelerometer system with one micro-g/root Hz resolution. The accelerometer and interface electronics together operate as a second-order electromechanical sigma-delta modulator. A detailed noise analysis of electromechanical sigma-delta capacitive accelerometers with a final goal of achieving sub-jig resolution is also presented. The analysis and test results have shown that amplifier thermal and sensor charging reference voltage noises are dominant...
Capacitive cmos readout circuits for high performance mems accelerometers
Kepenek, Reha; Külah, Haluk; Department of Electrical and Electronics Engineering (2008)
This thesis presents the development of high resolution, wide dynamic range sigma-delta type readout circuits for capacitive MEMS accelerometers. Designed readout circuit employs fully differential closed loop structure with digital output, achieving high oversampling ratio and high resolution. The simulations of the readout circuit together with the accelerometer sensor are performed using the models constructed in Cadence and Matlab Simulink environments. The simulations verified the stability and proper ...
Precision readout circuits for capacitive microaccelerometers
Yazdi, N; Külah, Haluk; Najafi, K (2004-01-01)
This paper presents a review of capacitive readout front-end circuits for high-precision accelerometers. The primary design parameters and the trade-offs affecting the resolution are presented. The discussions apply to all capacitive microsensor interfaces. Also a high-sensitivity capacitive accelerometer interface circuit for hybrid-integration with a surface/bulk micromachined micro-g accelerometer is described [7, 10]. The first generation of the circuit resolves 75aF of capacitance on similar to 120pF p...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
J. S. Mondragon-Ochoa et al., “Microwave-assisted in situ laser dye incorporation into high sensitivity whispering gallery mode microresonators,”
JOURNAL OF PHYSICS D-APPLIED PHYSICS
, vol. 55, no. 5, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/95179.