Hybrid lasing in a plasmonic cavity

Cao, Fengzhao; Niu, Lianze; Tong, Junhua; Li, Songtao; Hayat, Anwer; Wang, Meng; Zhai, Tianrui

doi:10.1364/oe.26.013383

Cited by 14 publications

(7 citation statements)

References 30 publications

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“…The fabricated 1D CQD lasers are linearly polarized. More details about the polarization effect can be found in our previous studies [38,39]. The width (w) of the Based on the rectangular cavity CQD DFB lasers are fabricated to achieve multi-wavelength lasing.…”

Section: Resultsmentioning

confidence: 99%

Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities

Hayat

Tong

Chen

et al. 2020

Sci. China Inf. Sci.

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Lasers with multi-wavelength colloidal quantum dots (CQDs) can be achieved using complex grating structures and flexible substrate. The structure contains graduated periods and rectangular cavity fabricated through interference lithography, which acts as the distributed feedback cavity. A layer of densely packed CQD film is deposited on the cavity via spin coating technique. The performance of CQD lasers based on different distributed feedback cavities is investigated. Multi-wavelength lasing is achieved based on a flexible rectangular cavity.

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Section: Resultsmentioning

confidence: 99%

Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities

Hayat

Tong

Chen

et al. 2020

Sci. China Inf. Sci.

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“…Besides the above‐mentioned systems, many other configurations for plasmonic lasers have been demonstrated using cavity modes from surface lattice plasmon mode in metal nanoparticles array, Tamm SPP mode, long‐range SPP mode, random mode to other diverse modes . Also, by operating at NIR region with relatively low metal losses, metal‐cladded 3D‐confined subdiffraction‐limit plasmonic nanolasers have been demonstrated, in which the cladding metals support TM cavity modes and behave more like perfect reflecting mirrors .…”

Section: Experimental Demonstrations Of the Plasmonic Nanolasersmentioning

confidence: 99%

Plasmonic Nanolasers: Pursuing Extreme Lasing Conditions on Nanoscale

Gao

et al. 2019

Advanced Optical Materials

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and techniques have been proposed and/ or developed. Here we focus on a newly emerging area-plasmonic nanolaser that pursuing extremely smaller cavity size in one or more dimensions, and consequently extreme lasing conditions, by using a plasmonic cavity with feature size possibly far below the diffraction limit of light.The miniaturization of a laser can be traced back to the early age of the laser, when compact semiconductor structures were introduced. In particular, the introduction of semiconductors as the gain media in 1962, [11,12] followed by a series of elaborately engineered structures from heterostructure, [13] quantum well, [14] vertical-cavity surface-emitting laser (VCSEL), [15,16] microdisk, [17][18][19] photonic crystal, [20][21][22] quantum dot [23,24] to nanowire (NW) [25][26][27] have made great success in shrinking a laser from bulk scale to wavelength level using reduced cavity sizes. [28] For example, to date, typical commercial edgeemitting quantum well laser diodes have dimensions of several micrometers in width and hundreds of micrometers in length, and a single quantum dot can lase in a photonic crystal cavity with overall dimension of merely 0.7(λ/n) 3 , where λ is the vacuum wavelength and n the refractive index of the dielectric. [29] With optimized geometry and material for cavity design, lower structural dimension is expected. However, in a dielectric cavity with limited refractive index n, the cavity size is intrinsically restricted by optical diffraction limit that sets an ultimate limit λ/2n for both cavity length and mode size in all three dimensions.An effective step to shrink a cavity beyond the diffraction limit is converting light into surface plasmon polaritons (SPPs) in nanostructuralized metals, which is a kind of collective oscillation of quasi free electrons on the interface of a metal and a dielectric. [30] While SPP is featured with ultrahigh optical confinement and ultrafast relaxation process as shown in Figure 1a, [31] it is inevitably accompanied by ultrahigh energy dissipation (i.e., Ohmic loss), leading to a mutual balance between the mode size and the optical loss in either a nanowaveguide or a nanocavity as shown in Figure 1b. [32] For example, the transverse mode area of SPP mode on an Ag nanowire with diameter of 100 nm can be as small as 0.01 µm 2 but also exhibits a propagation loss larger than 200 dB mm −1 . Despite of the high loss coefficient of plasmonic resonance at optical frequency, a properly designed nanoplasmonic cavity coupled with a gain medium is possible to lase with miniature cavity length.Owing to their ultrahigh optical confinement, plasmonic nanolasers with cavity sizes beyond the diffraction limit of light, are attracting increasing attention for pursuing extreme lasing conditions on nanoscale including ultracompact cavity mode, ultrafast lasing modulation, significantly enhanced light-matter interaction, and Purcell effect. In this review, the recent progress on plasmonic nanolasers from both theoretical and experimental aspects is intro...

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“…The metallic nanostructures used in these devices, such as Au and Ag spheres, have excellent optical properties that allow them to support localized surface plasmon resonances (LSPRs). − LSPR effectively transforms electromagnetic energy into surface plasmon polaritons, and this results in localized field enhancement at the interface between the dielectric and metallic surfaces when the frequency that is introduced matches the plasmon frequency. − In general, LSPR produces strong field enhancement and confinement, which can be used in optical nonlinearities . These unique properties have opened up a new realm of possibilities for an extensive range of applications, including microlasers and biochemical sensing.…”

Section: Introductionmentioning

confidence: 99%

Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing

et al. 2021

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Single-mode plasmonic lasing has great potential for use in photonic and sensing applications. In this work, single-mode lasing is realized using a plasmonic-enhanced woven microfiber that shows ultrahigh sensitivity to the ambient environment. This plasmonic-enhanced microfiber is fabricated by spraying Ag nanospheres onto rhodamine 6G-doped polymer microfibers. Single-mode laser emission with an ultranarrow linewidth (0.1 nm) and a low threshold (18.8 kW/ mm 2 ) is achieved in the microfiber using the effects of mode selection and plasmonic enhancement provided by the Ag nanospheres. A large wavelength shift in the singlemode lasing is observed when the proposed laser is used as a sensor and exposed to a humid or acidic environment. The wavelength shift is attributed to refractive index variations in the microfiber caused by either moisture absorption or chemical reactions. In humidity sensing, the laser's sensitivity is as high as 826.6 pm/% relative humidity (RH) and the detection limit is 0.051% RH. An innovative strategy for acetic acid gas sensing is proposed that uses the chemical reaction with rhodamine 6G, and its minimum response time is 5 min. Because of the microfiber's excellent fabric compatibility, a wearable sensor is fabricated by weaving the plasmonic-enhanced microfiber into clothes, and this sensor demonstrates extreme bending stability. The results reported here provide a novel approach to the design and fabrication of ultrasensitive wearable sensors for multifunctional sensing applications.

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Hybrid lasing in a plasmonic cavity

Cited by 14 publications

References 30 publications

Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities

Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities

Plasmonic Nanolasers: Pursuing Extreme Lasing Conditions on Nanoscale

Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing

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