Azimuthally Polarized Radial Emission from a Quantum Dot Fiber Laser

Zhang, Nan; Li, He; Stolyarov, Alexander M.; Zhang, Ting; Li, Kaiwei; Shum, Ping; Fink, Yoel; Sun, Xiao Wei; Wei, Lei

doi:10.1021/acsphotonics.6b00724

Cited by 30 publications

(35 citation statements)

References 30 publications

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“…The lasing threshold under 2PA pumping was found to be 1.39 mJ cm −2 as presented in Figure e,f. The obtained lasing thresholds under 1PA‐ and 2PA‐pumping are comparable to or lower than the previously reported best lasing thresholds from WGM resonators based on high‐performance engineered heterostructures of solution‐processed semiconductor NCs including CQD‐based (CdSe/CdZnS/ZnS, CdZnS/ZnS, CdSe/ZnS, and CdZnS/ZnS), nanorod‐based (CdSe/ZnS), and CQW‐based (CdSe/CdS) lasers. We attribute the high performance of this CQW‐WGM laser to the close‐packed solid film phase formation of our CQWs around the fiber while all of the previous reports are based on the solution phase (dispersion) of colloidal semiconductor NCs or on the microbubble formation .…”

Section: Resultssupporting

confidence: 71%

Coreless Fiber‐Based Whispering‐Gallery‐Mode Assisted Lasing from Colloidal Quantum Well Solids

Sak

Taghipour

Delikanlı

et al. 2019

Adv Funct Materials

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Whispering gallery mode (WGM) resonators are shown to hold great promise to achieve high-performance lasing using colloidal semiconductor nanocrystals (NCs) in solution phase. However, the low packing density of such colloidal gain media in the solution phase results in increased lasing thresholds and poor lasing stability in these WGM lasers. To address these issues, here optical gain in colloidal quantum wells (CQWs) is proposed and shown in the form of high-density close-packed solid films constructed around a coreless fiber incorporating the resulting whispering gallery modes to induce gain and waveguiding modes of the fiber to funnel and collect light. In this work, a practical method is presented to produce the first CQW-WGM laser using an optical fiber as the WGM cavity platform operating at low thresholds of ≈188 µJ cm −2 and ≈1.39 mJ cm −2 under one-and two-photon absorption pumped, respectively, accompanied with a record low waveguide loss coefficient of ≈7 cm −1 and a high net modal gain coefficient of ≈485 cm −1 . The spectral characteristics of the proposed CQW-WGM resonator are supported with a numerical model of full electromagnetic solution. This unique CQW-WGM cavity architecture offers new opportunities to achieve simple high-performance optical resonators for colloidal lasers.

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Section: Resultssupporting

confidence: 71%

Coreless Fiber‐Based Whispering‐Gallery‐Mode Assisted Lasing from Colloidal Quantum Well Solids

Sak

Taghipour

Delikanlı

et al. 2019

Adv Funct Materials

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“…The former can be achieved either by increasing the perovskite thickness or by longitudinal end pumping; [ 16 ] the latter by using high‐reflection mirrors directly coated around the periphery of the YAG crystal fiber. [ 17 ] Analogous to DFB, directly coating high‐reflection mirrors onto the periphery of the fiber is expected to provide an alternative for improving laser performance and to be compatible with longitudinal pumping.…”

Section: Figurementioning

confidence: 99%

Ultralow‐Threshold Continuous‐Wave Room‐Temperature Crystal‐Fiber/Nanoperovskite Hybrid Lasers for All‐Optical Photonic Integration

Nguyen

Sun

et al. 2021

Advanced Materials

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integrated perovskite light source in a compact fiber scheme, in which smaller is better, is highly desirable for all-optical onchip interconnects. Most of the reported perovskite lasers have so far been experimentally demonstrated either with pulse excitations or as ultrafast lasers. They have the shortcomings of significant complexity, high cost, and complicated setup (Table S1, Supporting Information), which do not meet the criteria of green energy. Ultrafast pulse pumping also implies that the system is larger than existing fiber devices, requires more hands-on maintenance, and is less reliable, thus increasing the complexity of integration with silicon microelectronics. Recently, a leading-edge 5 nm complementary metal oxide-semiconductor platform was demonstrated by Taiwan Semiconductor Manufacturing Company with a large production batch. [2] This success is expected to be extended to all-fiber photonic integration, thus realizing continuous-wave (CW) perovskite lasers in a fiber configuration is imperative. Despite the vigorous pace in the realization of CW perovskite lasers, the operating temperatures of these lasers have been impractically low, at the cryogenic temperature of 102 K, or at 77 or Continuous-wave (CW) room-temperature (RT) laser operation with low energy consumption is an ultimate goal for electrically driven lasers. A monolithically integrated perovskite laser in a chip-level fiber scheme is ideal. However, because of the well-recognized air and thermal instabilities of perovskites, laser action in a perovskite has mostly been limited to either pulsed or cryogenic-temperature operations. Most CW laser operations at RT have had poor durability. Here, crystal fibers that have robust and high-heatload nature are shown to be the key to enabling the first demonstration of ultralow-threshold CW RT laser action in a compact, monolithic, and inexpensive crystal fiber/nanoperovskite hybrid architecture that is directly pumped with a 405 nm diode laser. Purcell-enhanced light-matter coupling between the atomically smooth fiber microcavity and the perovskite nanocrystallites gain medium enables a high Q (≈1500) and a high β (0.31). This 762 nm laser outperforms previously reported structures with a record-low threshold of 132 nW and an optical-to-optical slope conversion efficiency of 2.93%, and it delivers a stable output for CW and RT operation. These results represent a significant advancement toward monolithic all-optical integration. Green energy and on-chip photonics have been two of the fastest growing fields in science and technology over the last decade. Metal-halide perovskites and fiber-based devices are both integral to the development of next-generation energy materials and all-optical photonic circuits. [1] A monolithically The ORCID identification number(s) for the author(s) of this article can be found under

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“…The first FOFL using NCs was implemented by infiltrating CdSe/ZnS QRs hexanes solution into a fiber-in-capillary microcavity, in which the high Q-factor of the telecom optical fiber provides the necessary conditions to achieve lasing and overcome the competing non-radiative loss [77]. Due to the high photostability of NCs, Wei's group [78] developed an azimuthally polarized radial laser emission by filling CdSe/CdZnS/ZnS QDs hexane solution in photonic bandgap fiber, offering a solution for omnidirectional display and phototherapy with minimal invasion. Lasing with aqueous QDs is crucial for their applications in biomedical environments.…”

Section: Nanocrystalsmentioning

confidence: 99%

“…The use of optical fibers in FOFL enables high coupling efficiency of the pump and remote pumping. For example, the optical fiber FP cavity [24,26] and photonic bandgap fiber [78,95,96] can transmit the pump laser into the optical microcavity to interact with the gain medium. The wavelength for pumping should be well-matched with the absorption band of the gain medium [Fig.…”

Section: Pump and Detectionmentioning

confidence: 99%

Recent Progress in Fiber Optofluidic Lasing and Sensing

et al. 2021

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Fiber optofluidic laser (FOFL) integrates optical fiber microcavity and microfluidic channel and provides many unique advantages for sensing applications. FOFLs not only inherit the advantages of lasers such as high sensitivity, high signal-to-noise ratio, and narrow linewidth, but also hold the unique features of optical fiber, including ease of integration, high repeatability, and low cost. With the development of new fiber structures and fabrication technologies, FOFLs become an important branch of optical fiber sensors, especially for application in biochemical detection. In this paper, the recent progress on FOFL is reviewed. We focuse mainly on the optical fiber resonators, gain medium, and the emerging sensing applications. The prospects for FOFL are also discussed. We believe that the FOFL sensor provides a promising technology for biomedical analysis and environmental monitoring.

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Azimuthally Polarized Radial Emission from a Quantum Dot Fiber Laser

Cited by 30 publications

References 30 publications

Coreless Fiber‐Based Whispering‐Gallery‐Mode Assisted Lasing from Colloidal Quantum Well Solids

Coreless Fiber‐Based Whispering‐Gallery‐Mode Assisted Lasing from Colloidal Quantum Well Solids

Ultralow‐Threshold Continuous‐Wave Room‐Temperature Crystal‐Fiber/Nanoperovskite Hybrid Lasers for All‐Optical Photonic Integration

Recent Progress in Fiber Optofluidic Lasing and Sensing

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