Simple Fabrication of an Organic Laser by Microcontact Molding of a Distributed Feedback Grating

Hermann, S.; Shallcross, R. Clayton; Meerholz, Klaus

doi:10.1002/adma.201401616

Cited by 10 publications

(12 citation statements)

References 29 publications

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“…The quantum dot devices exhibited lower lasing thresholds than the all conjugated polymer devices (45 versus 65 µJ/cm 2 ), which was attributed to the high refractive index of the quantum dot grating yielding stronger distributed feedback in these devices (Figure 13c-f). 254,255…”

Section: Nanoimprinting and Micro-contact Printingmentioning

confidence: 99%

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Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques

2016

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Organic dyes have been used as gain medium for lasers since the 1960s, long before the advent of today's organic electronic devices. Organic gain materials are highly attractive for lasing due to their chemical tunability and large stimulated emission cross section. While the traditional dye laser has been largely replaced by solid-state lasers, a number of new and miniaturized organic lasers have emerged that hold great potential for lab-on-chip applications, biointegration, low-cost sensing and related areas, which benefit from the unique properties of organic gain materials. On the fundamental level, these include high exciton binding energy, low refractive index (compared to inorganic semiconductors), and ease of spectral and chemical tuning. On a technological level, mechanical flexibility and compatibility with simple processing techniques such as printing, roll-to-roll, self-assembly, and soft-lithography are most relevant. Here, the authors provide a comprehensive review of the developments in the field over the past decade, discussing recent advances in organic gain materials, which are today often based on solid-state organic semiconductors, as well as optical feedback structures, and device fabrication. Recent efforts toward continuous wave operation and electrical pumping of solid-state organic lasers are reviewed, and new device concepts and emerging applications are summarized.

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Section: Nanoimprinting and Micro-contact Printingmentioning

confidence: 99%

“…253 (d) SEM image of microcontact printed quantum dots on a conjugate polymer film. 255 (e) AFM image of the same quantum dot grating. 255 (f) Emission spectrum of laser with micro contact printed grating of quantum dots 255 .…”

Section: Structure Formation Via Colloidal Self-assemblymentioning

confidence: 99%

Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques

2016

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“…The DFB configuration provides excellent mode selection and operates with a low threshold among those configurations [2]. The DFB configuration can be fabricated by molding [13] and imprinting [11] process. In addition, the holographic polymer-dispersed liquid crystal (HPDLC) grating can also provide well-defined DFB configuration via polymer-induced phase separation (PIPS) [14].…”

Section: Introductionmentioning

confidence: 99%

Organic Solid-State Tri-Wavelength Lasing from Holographic Polymer-Dispersed Liquid Crystal and a Distributed Feedback Laser with a Doped Laser Dye and a Semiconducting Polymer Film

Liu

Peng

et al. 2017

Materials

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Organic solid-state tri-wavelength lasing was demonstrated from dye-doped holographic polymer-dispersed liquid crystal (HPDLC) distributed feedback (DFB) laser with semiconducting polymer poly[-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-vinylene] (MEH-PPV) and laser dye [4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran] (DCM) by a one-step holography technique, which centered at 605.5 nm, 611.9 nm, and 671.1 nm. The temperature-dependence tuning range for the tri-wavelength dye-doped HPDLC DFB laser was as high as 8 nm. The lasing emission from the 9th order HPDLC DFB laser with MEH-PPV as active medium was also investigated, which showed excellent s-polarization characterization. The diffraction order is 9th and 8th for the dual-wavelength lasing with DCM as the active medium. The results of this work provide a method for constructing the compact and cost-effective all solid-state smart laser systems, which may find application in scientific and applied research where multi-wavelength radiation is required.

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Section: Molding Approachesmentioning

confidence: 99%

“…Thomas et al first demonstrated this technique with a nanocrystal–titania prepolymer solution . Shallcross and co‐workers, have developed micromolding patterned gratings with both CdSe ink and a mixture of CdSe and a red‐emitting polymer . Though this method can be applied in mild conditions, generally the quality is not as good as nanoimprint, as the uniformity across large areas could not be easily obtained (Figure e).…”

Section: Molding Approachesmentioning

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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Simple Fabrication of an Organic Laser by Microcontact Molding of a Distributed Feedback Grating

Cited by 10 publications

References 29 publications

Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques

Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques

Organic Solid-State Tri-Wavelength Lasing from Holographic Polymer-Dispersed Liquid Crystal and a Distributed Feedback Laser with a Doped Laser Dye and a Semiconducting Polymer Film

Composite Structures with Emissive Quantum Dots for Light Enhancement

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