A curvature-tunable random laser

Lee, Ya Ju; Yeh, Ting Wei; Yang, Zu Po; Yao, Yung Chi; Chang, Chih-Yuan; Tsai, Meng-Tsan; Sheu, Jinn-Kong

doi:10.1039/c8nr09153f

Cited by 55 publications

(35 citation statements)

References 44 publications

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“…This concept can be further developed for monitoring the instantaneous physiological phenomenon in biological imaging with lower noise. [ 152 ] In polymer fibers, incorporating porous structures can produce a so‐called inverted photonic glass, which leads to tunable random lasing by simply bending the fiber. [ 153 ] Metal–organic framework (MOF) nanostructures have also been used as scattering centers for random lasing.…”

Section: Typical Resonator Architecturesmentioning

confidence: 99%

Toward Electrically Pumped Organic Lasers: A Review and Outlook on Material Developments and Resonator Architectures

Zhang

Wen²,

Huang³

et al. 2021

Advanced Photonics Research

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Organic lasers have undergone decades of development. A myriad of materials with excellent optical gain properties, including small molecules, dendrimers, and polymers, have been demonstrated. Various resonator geometries have also been applied. While sharing the advantages of the solution processability and mechanical flexibility features of organic materials, organic optical gain media also offer interesting optical properties, such as emission tunability through chemical functionalization and inherent large optical gain coefficients. They offer prospects for different applications in the fields of bioimaging, medicine, chemo‐ and biosensing, anticounterfeit applications, or displays. However, the realization of electrically pumped organic lasers still remains a challenge due to the inherent drawbacks of organic semiconductors, e.g., modest carrier mobility, long‐lived excited‐state absorption, and extra losses which originate in the device (e.g., absorption from metal electrodes). Herein, the past developments of organic lasers are discussed, highlighting the importance of materials and cavities with regard to the goal of electrically pumped organic lasers. The latest progress and the possible ways to address the challenge are discussed.

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Section: Typical Resonator Architecturesmentioning

confidence: 99%

Toward Electrically Pumped Organic Lasers: A Review and Outlook on Material Developments and Resonator Architectures

Zhang

Wen²,

Huang³

et al. 2021

Advanced Photonics Research

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“…They can be used as high‐quality, bright illumination sources for full‐field imaging, since unconventional laser architectures with low spatial coherence allow for producing images without speckle artefacts. [ 25 ] In previous works, random lasers made of colloidal solutions or perovskite films have been proposed as tool for speckle‐free imaging. [ 12,26,27 ] In order to analyze this capability for ASE transient devices, we use them to illuminate a 1951 U.S. Air Force (AF) resolution test chart, and compare so‐obtained images with those produced by a narrowband laser (Nd:YAG).…”

Section: Figurementioning

confidence: 99%

Naturally Degradable Photonic Devices with Transient Function by Heterostructured Waxy‐Sublimating and Water‐Soluble Materials

et al. 2020

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Combined dry-wet transient materials and devices are introduced, which are based on water-dissolvable dye-doped polymers layered onto nonpolar cyclic hydrocarbon sublimating substrates. Light-emitting heterostructures showing amplified spontaneous emission are obtained on transient elements and used as illumination sources for speckle-free, full-field imaging, and transient optical labels are realized that incorporate QR-codes with stably encoded information. The transient behavior is also studied at the microscopic scale, highlighting the real-time evolution of material domains in the sublimating compound. Finally, the exhausted components are fully soluble in water thus being naturally degradable. This technology opens new and versatile routes for environmental sensing, storage conditions monitoring, and organic photonics. Devices that undergo an univocally evolving designed function, possibly including a self-elimination process to harmless end products through mechanical fragmentation and dissolution in water or air, are collectively referred as physically transient electronics and photonics. [1,2] The interest in such technology is rapidly emerging, and various forms of transient electronics have been recently traced, [1] including dissolvable devices that deploy room-temperature liquid metals with high recycling efficiency. [3,4] Indeed, the continuous increase of electronic waste, that will be further enhanced by the daunting amount of sensors and devices to be used for the forthcoming Internet of Things, [5] is motivating significant concern. For these

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“…As a new type of lasers, random lasers are based on random scattering feedback of photons in a random medium to achieve stimulated radiation amplification. [13,14] They have been intensively studied over the past few decades owing to its potential applications in speckle-free imaging, [15][16][17][18] sensing, [19,20] biomedical [21,22] and information security. [23] In a random laser, disorder-induced scattering feedback affects and tunes its emission performances and induce its low spatial coherence.…”

Section: Introductionmentioning

confidence: 99%

Programmable Random Lasing Pulses Based on Waveguide‐Assisted Random Scattering Feedback

Bian

Xue

Wang

2021

Laser & Photonics Reviews

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Programmable random lasing pulses are highly desired due to their promising applications in information security, flexible encoding systems, and smart imaging. However, the fixed random scattering configuration hinders their realization. Herein, a programmable random laser is designed to dynamically regulate random lasing pulses through introducing an external waveguide structure with random scattering feedback. Liquid and solid film random lasers are thus separately achieved. Most importantly, various pulse time series of random lasing can be flexibly realized by switching the adhesion/separation state between the gain and the destroyed waveguide structure. The Feinam coding system is further realized for encryption and information transmission by combining programmable random pulses. The results may widely expand the application prospects of random lasers in the fields of optical data recording, dynamic security labels, smart sensing, and flexible imaging.

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A curvature-tunable random laser

Abstract: We report the first experimental demonstration of curvature-tunable random lasers to control the transport mean free path of emitted photons.

Cited by 55 publications

References 44 publications

Toward Electrically Pumped Organic Lasers: A Review and Outlook on Material Developments and Resonator Architectures

Toward Electrically Pumped Organic Lasers: A Review and Outlook on Material Developments and Resonator Architectures

Naturally Degradable Photonic Devices with Transient Function by Heterostructured Waxy‐Sublimating and Water‐Soluble Materials

Programmable Random Lasing Pulses Based on Waveguide‐Assisted Random Scattering Feedback

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