Lasing from Narrow Bandwidth Light-Emitting One-Dimensional Nanoporous Photonic Crystals

Gunenthiran, Satyathiran; Wang, Juan; Zhao, Wanxia; Law, Cheryl Suwen; Lim, Siew Yee; McInnes, J.; Ebendorff-Heidepriem, Heike; Abell, Andrew D.; Alwahabi, Zeyad T.; Santos, Abel

doi:10.1021/acsphotonics.1c01689

Cited by 6 publications

(4 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Valve metals' anodizing under periodically oscillating conditions is a low-cost, scalable, and reproducible method of preparing one-dimensional (1D) PhCs [4][5][6][7][8][9][10]. PhCs based on anodic aluminium oxide (AAO) are used in chemical sensors [5,[11][12][13][14], low-threshold lasers [15,16], optical filters [17,18], photonic tags [19], and photocatalysis [20,21].…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Photonic Crystals with Nonbranched Pores Prepared via Phosphorous Acid Anodizing of Aluminium

et al. 2022

View full text Add to dashboard Cite

One-dimensional photonic crystals (1D PhCs) obtained by aluminium anodizing under oscillating conditions are promising materials with structure-dependent optical properties. Electrolytes based on sulphuric, oxalic, and selenic acids have been utilized for the preparation of anodic aluminium oxide (AAO) 1D PhCs with sub-100-nm pore diameter. AAO films with larger pores can be obtained by anodizing in phosphorous acid at high voltages. Here, for the first time, anodizing in phosphorous acid is applied for the preparation of AAO 1D PhCs with nonbranched macropores. The sine wave profile of anodizing voltage in the 135–165 V range produces straight pores, whose diameter is above 100 nm and alternates periodically in size. The pore diameter modulation period linearly increases with the charge density by a factor of 599 ± 15 nm·cm2·C−1. The position of the photonic band gap is controlled precisely in the 0.63–1.96 µm range, and the effective refractive index of AAO 1D PhCs is 1.58 ± 0.05.

show abstract

Section: Introductionmentioning

confidence: 99%

One-Dimensional Photonic Crystals with Nonbranched Pores Prepared via Phosphorous Acid Anodizing of Aluminium

et al. 2022

View full text Add to dashboard Cite

show abstract

“…These include multi‐sinusoidal anodization, integration of apodization functions with sinusoidal anodization, feedback regime on the rate of chemical etching, and further optimization of electrolyte concentration, temperature, and composition. [ 19c,d,e,f,55 − 61 ] NAA–GIFs were also used as PC platforms to generate linear variable bandpass filters (NAA–LVBPFs) by progressive pore widening of the original PC structure in phosphoric acid solution to engineer the effective medium both laterally and in depth. [ 62 ] Another form of 1D NAA–PCs are optical microcavities (NAA–μQVs), which are PC structures that confine light to small volumes by resonant recirculation of electromagnetic waves within two highly reflecting mirrors.…”

Section: Structure and Fabrication Of Naa–pcsmentioning

confidence: 99%

Nanoporous Anodic Alumina Photonic Crystals for Sunlight Harvesting Applications: A Perspective

et al. 2022

Self Cite

View full text Add to dashboard Cite

Nanoporous anodic alumina (NAA) fabricated by anodization of aluminum is a versatile platform material with tailorable geometric, optical, and chemical features for specific light‐based technologies and applications. Recent advances in anodization technology have enabled a new generation of NAA‐based photonic crystals (PCs)—periodic dielectric nanoporous structures that selectively allow, forbid, and confine the flow of incoming electromagnetic waves of specific wavelengths across their structure. NAA–PCs provide exciting new opportunities to engineer light–matter interactions with versatility across the broad spectrum, from UV to IR. But despite these fundamental advances, demonstrations of sunlight‐harvesting technologies based on NAA–PCs are still limited. Herein, an up‐to‐date summary of recent advances in NAA–PC technology is provided, and proof‐of‐concept demonstrations and future pathways to propel this versatile platform material across sunlight‐harvesting technologies such as photocatalysis, photoelectrocatalysis, photothermal energy conversion, and solar cells are discussed.

show abstract

“…Of all these, optically inert nanoporous structures functionalized with light-emitting materials provide ideal platforms to create random lasing systems, where stimulated light emission can be precisely tuned by engineering the features of the scattering centers (pores) by various fabrication methods such as wet and dry chemical etching, imprinting, and template synthesis . Of all these potential structures, nanoporous anodic alumina (NAA) is an ideal solid-state platform material for developing lasing systems harnessing distinct optical phenomena (e.g., slow photons, random lasing). − NAA produced by anodization (electrochemical oxidation) of aluminum is a thin film of anodic aluminum oxide (alumina, Al 2 O 3 ) that features straight cylindrical nanopores along its thickness, from top to bottom and is homogeneously distributed across its surface. , NAA’s nanopores act as scattering centers, the geometric features of which can be tuned through anodization. Furthermore, NAA is chemically stable and mechanically robust, and its inner porous structure can be functionalized with a variety of light-emitting materials, providing a broad range of opportunities to engineer new forms of gain media.…”

Section: Introductionmentioning

confidence: 99%

Engineering of Solid-State Nanoporous Laser through Dendrimer-Encapsulated Fluorophores

Gunenthiran,

Law,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Dendrimers�nanosized macromolecules that can function as hosts for encapsulation of guest molecules�provide new avenues to engineer gain media for lasing systems. In this context, this study investigates the interplay between the geometric features of a model porous scattering medium, nanoporous anodic alumina (NAA), and the chemical features of a model fluorophore−dendrimer encapsulation system to maximize random lasing. The inner surface of the NAA platforms is functionalized with fluorophore molecules encapsulated within dendrimers via an electrostatic interaction. The resulting solid-state composite structures emit well-resolved, intense random lasing when subjected to optical pumping. By engineering fluorophore− dendrimer and geometric features of scattering medium, we can precisely tune the characteristics of random lasing emissions. It is found that lasing structures with low porosity and thickness functionalized with fluorophore molecules encapsulated in second-generation dendrimers provide the best platforms for lasing generation, resulting in a strongly polarized laser at ∼594 nm that has a high quality−gain product of ∼1588 au, a polarization quality of ∼0.86, and a lasing threshold of ∼0.05 mJ pulse −1 . Comparative analysis indicates that dendrimers achieve 2.5 times better random lasing than conventional surfactants due to improved encapsulation and minimization of photobleaching. Our results reveal the importance of the fluorophore encapsulation method and design of scattering media in the engineering of random lasing platforms for applications in optical and optoelectrical systems.

show abstract

Lasing from Narrow Bandwidth Light-Emitting One-Dimensional Nanoporous Photonic Crystals

Cited by 6 publications

References 55 publications

One-Dimensional Photonic Crystals with Nonbranched Pores Prepared via Phosphorous Acid Anodizing of Aluminium

One-Dimensional Photonic Crystals with Nonbranched Pores Prepared via Phosphorous Acid Anodizing of Aluminium

Nanoporous Anodic Alumina Photonic Crystals for Sunlight Harvesting Applications: A Perspective

Engineering of Solid-State Nanoporous Laser through Dendrimer-Encapsulated Fluorophores

Contact Info

Product

Resources

About