Organic nanophotonic materials: the relationship between excited-state processes and photonic performances

Abstract

Nanophotonics have recently captured broad attention because of their great potential in information processing and communication, which may allow rates and bandwidth beyond what is feasible in the realm of electronics. Organic materials could be well suitable for such applications due to their ability to generate, transmit, modulate and detect light in their lightweight and flexible nanoarchitectures. Their distinct nanophotonic properties strongly depend on their extrinsic morphologies and intrinsic molecular excited-state processes. In this feature article, we mainly focus on a comprehensive understanding of the relationship between molecular excited-state processes and the advanced photonic functionalities of organic micro/nano-crystals in recent organic nanophotonic research, and then expect to provide enlightenment for the design and development of tiny photonic devices with broadband tunable properties by tailoring the excited-state processes of organic microcrystals.

Peptide Nanophotonics: From Optical Waveguiding to Precise Medicine and Multifunctional Biochips

“…The effect was ascribed to propagation of exciton–polaritons which are strongly coupled quasi‐particles created between the laser‐excited fluorescence and the material excitons . Due to this completely different mechanism of the light propagation and strong optical confinement provided by high effective refractive index, active light waveguiding is observed in nanostructures with dimensions below diffraction limit and enables the light propagation along ultrathin waveguides at macroscale length of hundreds micrometers and more . These remarkable properties provide successful development of a new generation of nanophotonic devices including those which have acute bends of micrometer radius such as interferometers, couplers, and interconnectors …”

“…[181,182] These remarkable properties provide successful development of a new generation of nanophotonic devices including those which have acute bends of micrometer radius such as interferometers, couplers, and interconnectors. [182][183][184][185][186][187] Small 2018, 14, 1801147 Figure 8. Peptide-based 1 × 2-power Y-splitter with grating couplers at all three ports.…”

Recent Advances in 1D Organic Solid‐State Lasers

“…In contrast, organic molecules are of merits which are complementary with their inorganic counterparts, such as low cost in processing, high photoluminescence (PL) wavelength tunability ranging from ultraviolet to infrared, high PL efficiency, and high flexibility in modifying molecular structures . Moreover, there are abundant excited state processes for most organic materials for which the four‐level system can be easily fulfilled for population inversion . Organic lasers have made great progress since the first dye‐doped organic solid‐state laser (OSSLs) was demonstrated in 1966 .…”

Emission features, surface morphology and optical limiting properties of semiconducting Toluidine Blue O dye-poly(vinyl alcohol) nanocomposite architecture

“…Because of nonfluorescent H-aggregates, the molecules may undergo non-radiative decay through intersystem crossing (ISC) (quenching to triplet T1) after which absorption from T1 to a higher triplet state can occur (schematically shown in Fig. 8), causing the observed RSA under favourable conditions, for intensity 0.8139 KW/cm 2 (Fig. 7c).…”

“…Several studies on organic nanomaterials have been widely reported owing to their application as building blocks for different kinds of integrated photonic and optoelectronic devices mainly as a light waveguide, microscale light source, optical routers, photonic transistors, logical gates, multiplexers, photonic sensors and photoelectronic converters [1,2]. Over the past decades, polymer nanocomposites have drawn notable progress in scientific and industrial communities regarding optoelectronic and photonic technology, owing to their remarkable improvements on numerous functionalities such as optical, electrical and so on, without sacrificing the advantages of the polymer as well as inorganic/organic moieties [3,4].…”