Electrically Tunable Polymer Whispering-Gallery-Mode Laser

Liu, Fangyuan; Tong, Junhua; Xu, Zheng; Ge, Kun; Ruan, Jun; Cui, Libin; Zhai, Tianrui

doi:10.3390/ma15144812

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…[19] Therefore, the optical microcavity has developed rapidly with its advantages of high quality (Q) factor and small mode volume, in low threshold lasers, sensors, cavity quantum electrodynamics, cavity optomechanics, and other fields. [20][21][22][23][24][25] Since the beginning of the revolution in optical microcavities, there have been a vast number of cavities, e.g., Fabry-Perot interferometers (F-P), [26][27][28][29][30] DOI: 10.1002/lpor.202300343 distributed Bragg reflectors (DFB), [31][32][33][34][35][36] distributed Bragg reflection (DBR) cavities, [37][38][39][40] whispering gallery mode (WGM) resonators, [41][42][43][44][45][46][47][48] scattering system (SS), [49][50][51][52][53] and deformation cavities. [54][55][56][57] These specific geometries endow these microcavities with, respectively, distinct lasing emission features in frequency, direction, mode, time, or angular momentum.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Microcavity Lasers: Principle, Design, and Practical Application

Liang

Yan

Zhai

2023

Laser & Photonics Reviews

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Control coupling and synchronization of lasers has become increasingly attractive for their applications in spectroscopy, imaging, sensing, secret communication, and optical networks. As complex microcavities emerge, more complicated light–matter interactions, along with the resulting distinct lasing emission behavior, is induced in these hybrid microcavities. This review summarizes the most important advances and current deep insights into the inherent relationship between the hybrid microcavity geometries and lasing behaviors, which are classified as the modulated lasing output freedom, including wavelength, angular momentum, mode, direction, and their multiple combinations. Finally, based on scientific research and practical application, the challenges and prospects of future development of hybrid microcavities are proposed, hoping to provide valuable inspiration for further optimizing hybrid microcavities to achieve low thresholds, small divergence angles, and single‐mode microcavity lasers.

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Section: Introductionmentioning

confidence: 99%

Hybrid Microcavity Lasers: Principle, Design, and Practical Application

Liang

Yan

Zhai

2023

Laser & Photonics Reviews

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Switchable whispering gallery mode lasing via phase transition

Tong,

Ge,

et al. 2023

Opt. Lett.

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Combining phase-transition materials with optical microcavities may advance the applications of whispering-gallery mode (WGM) lasing in performance customization, sensing, and optical switching. In this study, switchable WGM lasing based on phase transition is reported. The device is designed by introducing the phase-transition hydrogel into the capillary microcavity. After approaching the phase-transition point in hydrogel, the number of WGM lasing modes decreases sharply with a significant blueshift in the wavelength. The phenomenon is caused by the increase in light scattering and decrease in effective refractive index of the device. Furthermore, single-mode lasing is obtained by manipulating the phase transition, which exhibits superior reversibility. This study may pave the way for designing and multifunctioning of novel WGM lasing in photonic devices.

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Effect of exceptional point on the performance of a bistable all-optical switch

Zhang,

Zhang

2024

Opt. Lett.

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Microring cavities based on whispering-gallery modes (WGMs) have a very high-quality factor (Q) and a small mode volume, greatly improving the interaction between light and matter, which has attracted great attention in microlaser, nonlinear, and sensing fields. Plasmonics in the microcavity further enhance compression of the optical field. Recently, research on enhanced optical sensing sensitivity and low threshold laser based on exceptional points (EPs) is quite impressive. In this work, we propose a new, to our knowledge, all-optical switch by using the bistable effect under the EP of an ultra-compact plasmonic racetrack resonator and perform numerical simulations using the finite-difference time-domain (FDTD) method. The introduction of EPs further enhances the localization of the light field and thus improves the Kerr nonlinear effect of the microcavity; low threshold optical bistability is achieved. The results show that the device under an EP has a relatively lower threshold (input optical power threshold of 2.2 MW/cm2), shorter switching time (1.725 ps), and significantly improved switching contrast (17.16 dB) compared with those without EP. Our research lays the groundwork for optical switches that are chip-integrated, have low power consumption, and exhibit short switching times.

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Electrically Tunable Polymer Whispering-Gallery-Mode Laser

Cited by 4 publications

References 45 publications

Hybrid Microcavity Lasers: Principle, Design, and Practical Application

Hybrid Microcavity Lasers: Principle, Design, and Practical Application

Switchable whispering gallery mode lasing via phase transition

Effect of exceptional point on the performance of a bistable all-optical switch

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