Detection of nanoparticle changes in nanocomposite active sample using random laser emission

Shojaie, Ehsan; Madanipour, Khosro

doi:10.1117/12.2270275

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The main features of the random laser have been reported for the first time in the pioneering theoretical work of Letokhov [ 2 ] at the end of 1960s and experimentally realized since the 1990s in laser dye with nanoparticles [ 3 ], polymer films [ 4 ], organic media [ 5 ], laser crystal powder [ 6 ], cold atoms [ 7 ], semiconductor powder [ 8 ], dye-infiltrated biological tissue [ 9 ], optical fibers [ 10 , 11 , 12 ], stimulated Raman scattering [ 13 ], liquid crystals [ 14 , 15 , 16 ], plasmonics [ 17 , 18 ], dye-infiltrated opals [ 19 ], and perovskite [ 20 ]. The characteristics of the random laser have been extensively studied during the last three decades, and applications have been proposed, in particular in the fields of sensing [ 21 , 22 , 23 , 24 , 25 , 26 ], illumination [ 27 , 28 , 29 , 30 ], spectroscopy [ 31 ], optical networks [ 32 , 33 ], the statistics of events and fluctuations [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ], replica symmetry breaking phenomenology [ 44 , 45 , 46 , 47 , 48 ,…”

Section: Introductionmentioning

confidence: 99%

Direct Measurement of the Reduced Scattering Coefficient by a Calibrated Random Laser Sensor

Tommasi

Auvity

Fini

et al. 2022

Sensors

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The research in optical sensors has been largely encouraged by the demand for low-cost and less or non-invasive new detection strategies. The invention of the random laser has opened a new frontier in optics, providing also the opportunity to explore new possibilities in the field of sensing, besides several different and peculiar phenomena. The main advantage in exploiting the physical principle of the random laser in optical sensors is due to the presence of the stimulated emission mechanism, which allows amplification and spectral modification of the signal. Here, we present a step forward in the exploitation of this optical phenomenon by a revisitation of a previous experimental setup, as well as the measurement method, in particular to mitigate the instability of the results due to shot-to-shot pump energy fluctuations. In particular, the main novelties of the setup are the use of optical fibers, a reference sensor, and a peristaltic pump. These improvements are devoted to: eliminating optical beam alignment issues; improving portability; mitigating the variation in pump energy and gain medium performances over time; realizing an easy and rapid change of the sensed medium. The results showed that such a setup can be considered a prototype for a portable device for directly measuring the scattering of liquid samples, without resorting to complicated numerical or analytic inversion procedures of the measured data, once the suitable calibration of the system is performed.

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Section: Introductionmentioning

confidence: 99%

Direct Measurement of the Reduced Scattering Coefficient by a Calibrated Random Laser Sensor

Tommasi

Auvity

Fini

et al. 2022

Sensors

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“…RL action has been achieved using laser powders [14], liquid crystals [15], dielectric particles [16] and biological tissue [17,18], to name a few. The idea behind using RL action for biological tissue characterization is supported by the fact that, according to RL theory, even small changes in the scattering ensemble may lead to dramatic changes in the characteristics of the RL emission [19,20]. In other words, RL allows for mapping the changes in the microstructure to the spectral features (e.g., wavelength and laser threshold) of the laser emission.…”

Section: Introductionmentioning

confidence: 99%

Random laser imaging of bovine pericardium under the uniaxial tensile test

Cuando-Espitia

Sánchez-Arévalo

Hernández‐Cordero

2018

Biomed. Opt. Express

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We demonstrate random laser (RL) emission from within bovine pericardium (BP) tissue. The interest in BP relies on its wide use as a valve replacement and as a biological patch. By imaging the emitting tissue, we show that RL emission is mostly generated inside the collagen fibers. Multimode RL operation is thus achieved within the volume of each fiber. Image analysis reveals that the intensity of the RL emission from individual fibers is dependent on the relative orientation to the stress axis. Our results suggest that RL intensity may be used as an indicator of stress concentration in individual fibers.

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Detection of nanoparticle changes in nanocomposite active sample using random laser emission

Cited by 2 publications

References 11 publications

Direct Measurement of the Reduced Scattering Coefficient by a Calibrated Random Laser Sensor

Direct Measurement of the Reduced Scattering Coefficient by a Calibrated Random Laser Sensor

Random laser imaging of bovine pericardium under the uniaxial tensile test

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