Relevance of radiative transfer processes on Nd3+ doped phosphate glasses for temperature sensing by means of the fluorescence intensity ratio technique

Pérez-Rodríguez, C.; Martín, Leopoldo L.; León-Luis, Sergio F.; Martı́n, I.R.; Kumar, K. Ravi; Jayasankar, C.K.

doi:10.1016/j.snb.2014.01.037

Cited by 83 publications

(38 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(C coefficient) changes significantly: it is only close to the theoretical value for the low Nd 3 þ -doped glass, confirming the relevance of the Nd 3 þ ion concentration on the thermal parameters of interest (Table 3) [21,22]. Nevertheless, and despite that the populations of the thermalized levels should increase for both glasses at the same rate following a Boltzmann distribution independently of the dopant concentration, the changes of the emission intensity ratios with temperature are not equal for both glasses, being higher for the glass with lower Nd 3 þ concentration.…”

Section: Transitionsmentioning

confidence: 66%

“…In previous works [21,22], the authors have showed that these coefficients, especially C, can differ from those obtained theoretically from Eq. (1).…”

Section: Theoretical Backgroundmentioning

confidence: 75%

“…From a theoretical point of view, the intensity ratio between two thermalized emissions can be associated with the temperature of the optical sensor through the following relation [21,22]:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The emission intensity of each thermalized level can be determined from the Gaussian deconvolution of the total emission spectra or, directly, integrating over a proper wavelength range. The election of one method over the other depends on the overlapping of the emission profiles [21,22]. Once determining the contribution of each thermalized level to the total emission, the experimental intensity ratio, R Exp , can be fitted to an exponential temperature-dependent function,…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Finally, the quality of an optical sensor is given by its thermal sensitivity S to changes of temperature. This parameter is defined as the rate of change of the ratio R with temperature, and it allows comparison between different optical temperature sensors [8,22]. Its value is calculated from the following expression:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

See 4 more Smart Citations

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Lalla

León-Luis

Monteseguro

et al. 2015

Journal of Luminescence

Self Cite

View full text Add to dashboard Cite

Section: Transitionsmentioning

confidence: 66%

“…In previous works [21,22], the authors have showed that these coefficients, especially C, can differ from those obtained theoretically from Eq. (1).…”

Section: Theoretical Backgroundmentioning

confidence: 75%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

See 3 more Smart Citations

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Lalla

León-Luis

Monteseguro

et al. 2015

Journal of Luminescence

Self Cite

View full text Add to dashboard Cite

Luminescent Nd³⁺‐Based Microresonators Working as Optical Vacuum Sensors

Soler-Carracedo

Runowski

Martín

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

this technology is the requirement of precise and reliable vacuum measurements. The advances in the field come along with harder requirements to meet in terms of precision and miniaturization of the sensors. [3] Vacuum gauges currently used are based on mechanical deformation, [4,5] thermal conductivity [6-8] such as Pirani, [9] thermocouple or thermistor gauges; ionization [10,11] and spinning rotations. [12] All these approaches are more or less suitable depending on the pressure range of the measurements. But for all ranges, the vacuum gauges based on the previous parameters have an uncertainty from around 1% to 20%. Another approach to measure vacuum that has been barely investigated is the use of optical sensor. Up to date, the only researches following this approach were based on heterodyne [13,14] and optical fiber interferometry, [15,16] resonance effects [17-19] or magneto-optical trapping. [2] Furthermore, luminescent materials play an important role as phosphors, contrast agent, labels, optical heaters/coolers, temperature and pressure sensors, etc. [20,21] In the field of luminescent materials, the lanthanide based organic and inorganic compounds are of special importance. This is mostly due to their favorable optical properties, such as multicolor emission and up-conversion luminescence, narrow absorption and emission bands, large Stokes shift, long radiative lifetimes, etc. [22-24] Recently, in our previous publication, [21] we showed for the first time the possibility of converting luminescence thermometer into the optical vacuum sensor. To present this Glass microspheres embedded with Nd 3+-doped nanoperovskites based on yttrium orthoaluminate are synthesized and used as optical vacuum sensor. Under 532 nm excitation, the microspheres show two emission bands centered at 820 and 890 nm, corresponding to the 2 H 9/2 , 4 F 5/2 → 4 I 9/2 and 4 F 3/2 → 4 I 9/2 transitions. When the microspheres are heated by laser excitation in air (ambient conditions), the positions of the Stark level transitions shift toward red or blue spectral regions. Additionally, the full width at half maximum of these peaks increases. Furthermore, due to the specific geometry of the microspheres, it is possible to trap the emitted light inside the microsphere resonator, in the form of whispering-gallery-modes (WGM). When the microspheres are heated, these resonant modes present higher shifts toward lower energies than those for the Stark levels. As pressure decreases, the thermal exchange (convection process) between the microsphere and the surrounding air molecules decreases, which leads to an increase on the temperature of the microsphere. Based on this effect, the response of the WGM spectral positions as a function of pressure level is used to calibrate the luminescent microspheres as optical vacuum sensors. Relative sensitivity and limit of detection are obtained and compared with other optical vacuum sensors.

show abstract

Fluorescence Intensity Ratio‐based temperature sensor with single Nd^{3 +} :Y₂O₃ nanoparticles: Experiment and theoretical modeling

et al. 2020

View full text Add to dashboard Cite

A thermometer based on single Nd3 + :Y2O3 nanoparticles is reported. The nanothermometer relies on the ratio of thermally coupled Nd3 + emission lines accessible by either continuous‐wave upconversion under 880 nm or downconversion under 532 nm excitation wavelengths. Both processes are modeled through rate equation systems based on multiphonon interactions between excited luminescent states, which led to excellent agreement with the experimental data. Moreover, the Y2O3 effective phonon mode energy was determined, showing the appropriateness of the theoretical approach used. The system presented a relative sensitivity up to 1.36% at 300 K while working within the first biological window, thus particularly useful for biological sensing applications.

show abstract

Relevance of radiative transfer processes on Nd3+ doped phosphate glasses for temperature sensing by means of the fluorescence intensity ratio technique

Cited by 83 publications

References 26 publications

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Luminescent Nd³⁺‐Based Microresonators Working as Optical Vacuum Sensors

Fluorescence Intensity Ratio‐based temperature sensor with single Nd^{3 +} :Y₂O₃ nanoparticles: Experiment and theoretical modeling

Contact Info

Product

Resources

About

Relevance of radiative transfer processes on Nd3+ doped phosphate glasses for temperature sensing by means of the fluorescence intensity ratio technique

Cited by 83 publications

References 26 publications

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Optical temperature sensor based on the Nd3+ infrared thermalized emissions in a fluorotellurite glass

Luminescent Nd3+‐Based Microresonators Working as Optical Vacuum Sensors

Fluorescence Intensity Ratio‐based temperature sensor with single Nd3 + :Y2O3 nanoparticles: Experiment and theoretical modeling

Contact Info

Product

Resources

About

Luminescent Nd³⁺‐Based Microresonators Working as Optical Vacuum Sensors

Fluorescence Intensity Ratio‐based temperature sensor with single Nd^{3 +} :Y₂O₃ nanoparticles: Experiment and theoretical modeling