Chapter 1 Principles and Characteristics of Integratable Active and Passive Optical Devices

Wang, Shyh

doi:10.1016/s0080-8784(08)62965-8

Cited by 6 publications

(1 citation statement)

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“…In the context of photonic applications, devices can function in passive or active operational regimes [50,51]. In the context of optical signal processing, passive operations are those in which the input wavelength is equal to the output wavelength, whereas in an active regime the input and output wavelengths are different.…”

Section: Introductionmentioning

confidence: 99%

Optics of an individual organic molecular mesowire waveguide: directional light emission and anomalous refractive index

Tripathi¹,

Dasgupta²,

Chikkaraddy³

et al. 2016

J. Opt.

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We report on experimental investigations performed on an isolated organic mesowire waveguide resting on a glass substrate. The waveguide was made of diaminoanthraquinone (DAAQ) molecular aggregates. First, we show directional emission of light from distal ends of the DAAQ waveguide. For a given mesowire geometry, operating in passive or photoluminescence regimes, we quantified the emission angles by combining multi-wavelength Fourier-plane optical microscopy and photoluminescence micro-spectroscopy. We found light emission in the photoluminescence regime to be more directional in nature compared to the passive waveguiding regime, which was supported by three-dimensional finite-difference time-domain (FDTD) simulations. Second, we measured the anomalous behaviour of refractive index as a function of emission wavelength using the spectra of directionally emitted light. Third, by using spatial-filtered collection optics, we observed and quantified single-excitation dual-channel directional, active emission from DAAQ mesowire. The results discussed herein has implication not only in understanding some fundamental aspects of exciton-polariton mediated directional light emission, but also in applications such as organic optical antennas and photonic couplers.

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Section: Introductionmentioning

confidence: 99%