Line Width-Tunable Random Laser Based on Manipulating Plasmonic Scattering

Shi, Xiaoyu; Chang, Qing; Bian, Yaoxing; Cui, Hongbiao; Wang, Zhaona

doi:10.1021/acsphotonics.9b00508

Cited by 34 publications

(18 citation statements)

References 46 publications

(68 reference statements)

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“…In addition, the unique feedback regime of random laser endows it with fluctuated emission intensity. [ 35 ] Therefore, the intensity ratio between the coupled modes in Figure 3a is arbitrary without any regularity. And part of the modes is missing in the spectra for the low coupling efficiency.…”

Section: Resultsmentioning

confidence: 99%

Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication

Shi

Song

Guo

et al. 2021

Laser & Photonics Reviews

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Toward a higher degree of secure communication, great efforts have been made to develop encryption and anticounterfeiting strategies. In particular, optical encryption with high complexity has become one of the most significant approaches. To strengthen optical information security, the concept of a spectral encryption approach is proposed based on selectively visualized spectral modes in random lasers. By coupling with external whispering gallery mode cavity, hidden localized lasing modes with special multiple‐peaks spectra are selected from phase‐correlated random lasers with smooth single‐peak spectra. The selectively visualized localized modes are utilized for spectral encryption of secure information. The encoded spectral modes that are hidden in phase‐correlated modes with identical spectra can only be selectively recognized by a special external coupler. This multiplex encryption strategy is super for the simple operation, low cost, and high security, supplying a new approach for further applications in secure communication and anticounterfeiting.

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Section: Resultsmentioning

confidence: 99%

Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication

Shi

Song

Guo

et al. 2021

Laser & Photonics Reviews

Self Cite

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“…It is because the SRS intensity depends on both pump and random laser intensities 11 , 21 . Generally, output intensity in random lasers due to the absence of a stationary cavity is influenced by the multiple elastic scattering, which is occurred randomly at different directions 39 , 40 . Particularly, the fluctuations in the output intensity are further in solution random lasers because the Brownian motion of particles makes different configurations of scatterers at each excitation pulse 41 .…”

Section: Resultsmentioning

confidence: 99%

Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect

Hosseini

Yazdani

Sajad

2021

Sci Rep

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This study reports the first experimental observation of cascaded stimulated Raman scattering (SRS) generation in a colloidal disordered medium. Generation of the cascaded effect requires both a high Raman gain and pump power in the disordered medium. Here, to extend effective path lengths of photons into the Raman gain medium for producing additional SRS processes, ZnO microspheres with abundant nano-protrusions as suitable scattering centers are proposed. It is explained that nano-protrusions on the surface of the spheres can act as nano reflectors and significantly provide potent feedback in the disordered system. This provided feedback via nano-protrusions boosts cascaded SRS generation to allow the appearance of higher Raman signals of Rhodamine 6G dye solution at a low scatterer concentration of 5 mg/ml. The threshold for the formation of the first Raman signal is measured at about 60 mJ/pulse. Also, the evolution of Raman signals under several fixed pump pulses is examined to investigate the stability from pulse to pulse. Our findings provide promising perspectives for achieving the single-frequency laser sources and generate desirable wavelengths for specific applications.

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“…On the other hand, plasmonic random lasers with well controlled properties and low thresholds exhibit growing research interests because of their enhanced light scattering and strong confinement of optical fields. [31][32][33][34][35] The random lasing properties, such as wavelength, [36][37][38][39][40] polarization, [41] spectral profile, [42] and linewidth, [43] can be controlled effectively by plasmonic structures. Wherein, the emission wavelength of the random lasers using plasmonic nanostructures coupled with dye molecules, can be modulated by changing the size of gold nanoisland structure, [36] the thickness of waveguide gain films, [37] and selecting different dye molecules.…”

Section: Introductionmentioning

confidence: 99%

Tunable Plasmonic Random Laser Based on Emitters Coupled to Plasmonic Resonant Nanocavities of Silver Nanorod Arrays

Zhang

Wang

Ghafoor

et al. 2022

Advanced Optical Materials

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Random lasers are generated by multiple light scattering in disordered optically gain medium, which are fundamentally different from conventional lasers. Control of emission properties, especially emission wavelength for random lasers is still challenging due to absence of optical cavity. Although plasmonic random lasers exhibit well‐controlled properties, most of studies on plasmonic random lasers to date are still focused on scattering amplification by disorder metal nanoparticles. Here, a tunable random laser based on emitters of Nile red/poly‐methyl methacrylate (PMMA) coupled to plasmonic resonant nanocavities of silver nanorod arrays is presented. The plasmonic random laser has very strong and narrow emission peaks and a very low lasing threshold of 22.8 µJ, resulting from plasmon resonance energy transfer (PRET), the enhanced absorption, scattering, and excitation rates of Nile red/PMMA due to strong localized electric fields in the nanocavities, and enhanced multiple light scattering from the disorder–order hybrid silver nanorod arrays. Furthermore, the lasing wavelength can be tuned in a wide range from 623 to 654 nm by different order harmonic modes of the plasmonic resonant nanocavities. This work not only provides a new strategy to design tunable random lasers, but also opens up their potential applications in medicine and sensing.

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Line Width-Tunable Random Laser Based on Manipulating Plasmonic Scattering

Cited by 34 publications

References 46 publications

Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication

Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication

Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect

Tunable Plasmonic Random Laser Based on Emitters Coupled to Plasmonic Resonant Nanocavities of Silver Nanorod Arrays

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