Unraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high‐Q microlasers

Wang, Yue; Fong, Kah Ee; Yang, Shancheng; Ta, Van Duong; Gao, Yuan; Wang, Zeng; Nalla, Venkatram; Demir, Hilmi Volkan; Sun, Handong

doi:10.1002/lpor.201500063

Cited by 49 publications

(62 citation statements)

References 40 publications

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“…1a–e and Methods ), which is superior in the fabrication of soft-matter microcavities due to the precious control of the diameter and position36373839. Meanwhile, soap water was exploited to manipulate the surface tension of water.…”

Section: Resultsmentioning

confidence: 99%

Reconfigurable Liquid Whispering Gallery Mode Microlasers

Yang

Wang

et al. 2016

Sci Rep

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Engineering photonic devices from liquid has been emerging as a fascinating research avenue. Reconfigurably tuning liquid optical micro-devices are highly desirable but remain extremely challenging because of the fluidic nature. In this article we demonstrate an all-liquid tunable whispering gallery mode microlaser floating on a liquid surface fabricated by using inkjet print technique. We show that the cavity resonance of such liquid lasers could be reconfigurably manipulated by surface tension alteration originated from the tiny concentration change of the surfactant in the supporting liquid. As such, remarkable sensing of water-soluble organic compounds with a sensitivity of free spectral range as high as 19.85 THz / (mol · mL−1) and the detectivity limit around 5.56 × 10−3 mol · mL−1 is achieved. Our work provides not only a novel approach to effectively tuning a laser resonator but also new insight into potential applications in biological, chemical and environmental sensing.

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Section: Resultsmentioning

confidence: 99%

Reconfigurable Liquid Whispering Gallery Mode Microlasers

Yang

Wang

et al. 2016

Sci Rep

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“…These circuits also increasingly provide the basis of breakthrough experiments in fundamental optics research on cavity quantum electrodynamics and quantum optics. [20][21][22][23][24][25][26][27][28][29] Despite the confirmation of QDs as an optical-gain medium in microlasers, the lack of a suitable integration process and limited QD stability have inhibited the development of more complex, fully integrated waveguidecoupled laser sources that could propel PICs into radically new applications.Fabricating on-chip QD/SiN lasers requires an effective methodology to handle solution-processable QDs within a topdown CMOS (complementary metal oxide semiconductor)like manufacturing process. [1][2][3][4][5][6][7] Practical applications such as on-chip spectroscopy or biosensing require SiN PICs to be extended with active components, the most important of these being compact and tunable lasers.…”

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confidence: 99%

On‐Chip Integrated Quantum‐Dot–Silicon‐Nitride Microdisk Lasers

et al. 2017

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Hybrid silicon nitride (SiN)-quantum-dot (QD) microlasers coupled to a passive SiN output waveguide with a 7 µm diameter and a record-low threshold density of 27 µJ cm are demonstrated. A new design and processing scheme offers long-term stability and facilitates in-depth QD material and device characterization, thereby opening new paths for optical communication, sensing, and on-chip cavity quantum optics based on colloidal QDs.

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“…Inkjet‐Printed Structure: As mentioned in Section , ink‐jet printing is a one‐step fabrication method that enables the fabrication of large‐area arrays on various substrates with reasonable precision . For instance, toroid microlaser structures from self‐assembled CdZnS/ZnS QDs were fabricated by ink‐jet printing ( Figure a,b) …”

Section: Qd Composite Structure For Lasingmentioning

confidence: 99%

Section: Qd Composite Structure For Lasingmentioning

confidence: 99%

Composite Structures with Emissive Quantum Dots for Light Enhancement

Smith

Lin

et al. 2018

Advanced Optical Materials

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The optical properties of these nanostructures can be controlled via precise control of the synthetic parameters resulting in a wide range of chemical compositions, shapes, and dimensions. QDs are quite advantageous in comparison to traditional organic dye counterparts, offering size, and composition dependent energy band gaps (i.e., tunable absorption and photoluminescence), prospective excellent photostability, and solution and aqueous processability based on choice of surface chemistries. [2] Intense research in this field in the past two decades has focused on precisely engineering core-shell composition of QD nanostructures resulting in an appreciable impact on the field of photonic materials and structures to develop composite nanomaterials with precise control of refractive index, permittivity, and permeability.QDs are the promising candidate to control interactions in photonic systems in many respects due to their enhanced photostability, near 100% quantum yield, and versatile surface chemistry. More recently, facile synthetic techniques for large-scale high-quality production have been introduced that involve wet chemical processes to expand applicability of these components in light-managements devices. [5][6][7] However, the overall processability and scalability of these components into robust large-area structures are still a critical concern limiting real-life implementation in robust designs. While there are many techniques to produce QDs, common limitations for this class of nanomaterials are low quantity, large dispersibility in size, compositional nonuniformity, and the presence of excess passive components resulting from wet chemistry synthetic procedures (e.g., ligands).Providing a convenient host matrix not only overcomes some of these common limitations but allows for QDs to be used in more technologically exploitable forms such as robust, flexible, mechanically and chemically stable fibers, coatings, films, and patterns. [8] For such composite systems, inclusion of nanoparticles into sophisticated matrices typically results in the significant improvements of thermal, mechanical, electrical, and optical stabilities making them more applicable in device environment than other traditional organic materials.While the concept of embedding various nanostructures into different surrounding materials is not new, synthetic techniques required to combine these can be rather complex. Most Since their inception, quantum dots have proven to be advantageous for light management applications due to their high brightness and wellcontrolled absorption, scattering, and emission properties. As quantum dots become commercially available at large scale, the need for robust, stable, and flexible optical components continues to drive the development of robust and flexible quantum dot composite materials. In this review, after a thorough introduction to quantum dots, discussion delves into methods for fabricating quantum dot loaded composite optical elements such as thin films, microfabricated patterns, and micros...

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Unraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high‐Q microlasers

Cited by 49 publications

References 40 publications

Reconfigurable Liquid Whispering Gallery Mode Microlasers

Reconfigurable Liquid Whispering Gallery Mode Microlasers

On‐Chip Integrated Quantum‐Dot–Silicon‐Nitride Microdisk Lasers

Composite Structures with Emissive Quantum Dots for Light Enhancement

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