Low‐Threshold Nanolasers Based on Slab‐Nanocrystals of H‐Aggregated Organic Semiconductors

Xu, Zhenzhen; Liao, Qing; Shi, Qiang; Zhang, Hao‐Li; Yao, Jiannian; Fu, Hongbing

doi:10.1002/adma.201201579

Cited by 107 publications

(134 citation statements)

References 29 publications

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“…3a), we can find that the HDMAC crystal has a large stokes shift around 110 nm. This large shift contributes to the reduction of self-absorption effect in the optical materials42. More importantly, the HDMAC single crystal has excellent optical properties with solid quantum yield Φ of 30 ± 0.5% and the efficient radiate decay rate k f = 0.27 ± 0.1 ns −1 according to the equation, k f = Φ / τ ( τ = 1.12 ± 0.03 ns, as shown in Fig.…”

Section: Resultsmentioning

confidence: 95%

Shape-Engineering of Self-Assembled Organic Single Microcrystal as Optical Microresonator for laser Applications

Wang

Liao

Lü

et al. 2014

Sci Rep

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Single micro/nanocrystals based on π-conjugated organic molecules have caused tremendous interests in the optoelectronic applications in laser, optical waveguide, nonlinear optics, and field effect transistors. However, the controlled synthesis of these organic micro/nanocrystals with regular shapes is very difficult to achieve, because the weak interaction (van der Waals' force, ca. 5 kJ/mol) between organic molecules could not dominate the kinetic process of crystal growth. Herein, we develop an elaborate strategy, selective adhesion to organic crystal plane by the hydrogen-bonding interaction (ca. 40 kJ/mol), for modulating the kinetic process of the formation of microcrystal, which leads to the self-assembly of one organic molecule 3-[4-(dimethylamino)phenyl]-1-(2-hy-droxyphenyl)prop-2-en-1-on (HDMAC) into one-dimensional (1D) microwires and 2D microdisks respectively. Furthermore, these as-prepared microcrystals demonstrate shape-dependent microresonator properties that 1D microwires act as Fabry-Pérot (FP) mode lasing resonator and 2D microdisks provide the whispering-gallery-mode (WGM) resonator for lasing oscillator. More significantly, through the investigation of the size-effect on the laser performance, single-mode lasing at red wavelength was successfully achieved in the self-assembled 2D organic microdisk at room temperature. These easily fabricated organic single-crystalline microcrystals with controlled shapes are the natural laser sources, which offer considerable promise for the multi-functionalities of coherent light devices integrated on the optics microchip.

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Section: Resultsmentioning

confidence: 95%

Shape-Engineering of Self-Assembled Organic Single Microcrystal as Optical Microresonator for laser Applications

Wang

Liao

Lü

et al. 2014

Sci Rep

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“…where L is the cavity length, corresponding to the thickness of MOF crystal, λ is the light wavelength and n g is the group refractive index53. The measured mode spacing, Δ λ , at λ =640 nm demonstrates clearly a linear relationship with 1/ L (Supplementary Fig.…”

Section: Discussionmentioning

confidence: 95%

Confinement of pyridinium hemicyanine dye within an anionic metal-organic framework for two-photon-pumped lasing

et al. 2013

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Two-photon-pumped dye lasers are very important because of their applications in wavelength up-conversion, optical data storage, biological imaging and photodynamic therapy. Such lasers are very difficult to realize in the solid state because of the aggregation-caused quenching. Here we demonstrate a new two-photon-pumped micro-laser by encapsulating the cationic pyridinium hemicyanine dye into an anionic metal-organic framework (MOF). The resultant MOF⊃dye composite exhibits significant two-photon fluorescence because of the large absorption cross-section and the encapsulation-enhanced luminescent efficiency of the dye. Furthermore, the well-faceted MOF crystal serves as a natural Fabry–Perot resonance cavity, leading to lasing around 640 nm when pumped with a 1064-nm pulse laser. This strategy not only combines the crystalline benefit of MOFs and luminescent behaviour of organic dyes but also creates a new synergistic two-photon-pumped lasing functionality, opening a new avenue for the future creation of solid-state photonic materials and devices.

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“…Nano-and microscale organic solids [1][2][3][4] are emerging as promising photonic materials to realize miniaturized device applications such as wave guides, [3][4][5][6][7][8][9][10][11] lasers, [ 12,13 ] resonators, [ 14,15 ] circuits, [ 16 ] and optical fi lters. [ 17 ] In the next level of complexity, responsive organic solids which can change their shape and dimensions with respect to external perturbation are known to exhibit switchable photonic properties.…”

Section: Doi: 101002/adom201500106mentioning

confidence: 99%

Photonic Microrods Composed of Photoswitchable Molecules: Erasable Heterostructure Waveguides for Tunable Optical Modulation

Venkatakrishnarao

Mohiddon

Chandrasekhar

et al. 2015

Advanced Optical Materials

102

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Low‐Threshold Nanolasers Based on Slab‐Nanocrystals of H‐Aggregated Organic Semiconductors

Cited by 107 publications

References 29 publications

Shape-Engineering of Self-Assembled Organic Single Microcrystal as Optical Microresonator for laser Applications

Shape-Engineering of Self-Assembled Organic Single Microcrystal as Optical Microresonator for laser Applications

Confinement of pyridinium hemicyanine dye within an anionic metal-organic framework for two-photon-pumped lasing

Photonic Microrods Composed of Photoswitchable Molecules: Erasable Heterostructure Waveguides for Tunable Optical Modulation

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