Two-photon absorption and resulting refractive effects
Two photon absorption in semiconductor micro cavities
... in refractive index due to additional Al concentration shifts the wavelength of the cavity resonance by 1% of the design ...The effects of growth non-uniformity can be seen clearly in Figure ...by ...
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Photoluminescence upconversion at interfaces driven by a sequential two-photon absorption mechanism
... the effects of excitation across the GaAs band ...the two beams were coincident at the same spot on the ...a photon energy of ...the two upconversion PL spectra demonstrate that the unchopped ...
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Multi photon absorption limits to heralded single photon sources
... probabilistic photon generation with multi-photon processes in both the generation and collection of single photons for the first ...of photon pairs generated from spontaneous four-wave mixing in ...
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Femtosecond two-photon absorption spectroscopy of poly(fluorene) derivatives containing benzoselenadiazole and benzothiadiazole
... These effects are associated with the transition dipole moment (µ) and dipole moment change (∆µ), which govern the 2PA cross section in organic materials ...on two-photon absorption, for ...
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Enhanced two-photon absorption of ligated silver and gold nanoclusters: theoretical and experimental assessments
... the two- photon absorption and/or two-photon excited fluorescence cross-sections, as summarized in Table ...subtle effects such as the nature of ligands, the structure and charge ...
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All optical sampling based on two photon absorption in a semiconductor microcavity for high speed OTDM
... Optical Time Division Multiplexing (OTDM) 2 uses short optical pulses to represent data and multiplexes in the time domain by allocating each channel specific bit slots in the overall multiplexed signal. The basic ...
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Chromatic dispersion monitoring for high speed WDM systems using two photon absorption in a semiconductor microcavity
... arise due to variation of temperature and mechanical stress. The initial theoretical investigation and experimental verification is carried out for 10 GHz RZ pulses of approximately 2 ps dura- tion, resulting in a ...
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Competition between sub-bandgap linear detection and degenerate two-photon absorption in gallium arsenide photodiodes
... Our first experimental setup aims at investigating the pro- cesses responsible for the sub-bandgap response of several Optowell PP85-B1T0N GaAs PIN photodiode. The ball lens covering the detector has been removed, in ...
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Theory of direct and indirect effect of two-photon absorption on nonlinear optical losses in high power semiconductor lasers
... other two positions, reliable single-mode operation cannot be guaranteed and operation in the second order mode, at least for lower currents, as discussed in [31], cannot be ruled ...the refractive index ...
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Research Article Performance of All-Optical XNOR Gate Based on Two-Photon Absorption in Semiconductor Optical Amplifiers
... the finite gain and phase recovery time of their temporal response. The study is carried out when the effect of the ASE is taken into account in the simulation analysis. The primary noise in this calculation (which ...
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The role of the surfaces in the photon absorption in Ge nanoclusters embedded in silica
... these effects, the Tauc law, describing a in amorphous semiconductors, has been used [36]: hv B hv E g opt 2 , where hν, B, and E opt g are the incoming photon energy, the Tauc constant, and the ...
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Two-photon Fluorescence Light Microscopy
... occur, two-photon microscopy can still cause considerable ...of two-photon photodamage have been ...by two-photon or higher-photon excitation of endogenous and exogenous ...
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TWO-PHOTON EXCITATION FLUORESCENCE MICROSCOPY
... of two-photon pho- todamage have been ...by two- or higher photon excitation of endogenous and exogenous fluorophores with a photodamage pathway similar to that of UV ...the ...
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Optical signal processing via two photon absorption in a semiconductor microcavity for the next generation of high speed optical communications network
... A. Principle of TPA Autocorrrelation TPA in semiconductors is an attractive alternative to SHG for autocorrelation [16], [17] because of lower cost and increased sensitivity. TPA in photodiodes [9], [18] and AlGaAs ...
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Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy
... a photon pair is heralded at the SFG ...the two paths requires an additional tunable optical delay line to provide fine tuning ability of any optical path length difference between the two ...the ...
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Generation of Nonclassical Light by Unsaturated Two Photon Absorption
... to two-photon absorption (TPA) and the fac- tors that contribute to squeezing and antibunching of photons, leading to the generation of nonclassical ...absorbing two photons si- ...initial ...
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Two photon absorption based detection in semiconductor microcavities
... 5. Influence of limited cavity acceptance angle 5 .1 In flu e n c e o f acceptance angle In order for TPA based detection schemes to be considered for use it must be cost effective. In practice this means that the device ...
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Mid-infrared two photon absorption sensitivity of commercial detectors
... power, two-photon GaAs/InGaAs quantum well infrared photodetectors (2P-QWIP) have been ...adequate two-photon absorption (TPA) sensitivity, whereas the second harmonic conversion ...
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Polarization dependence of a GaAs based two photon absorption microcavity photodetector
... Fig. 5. Dependence of the TPA photocurrent on the state of polarization as it is rotated from circular to linear to circular along 4 different longitudinal lines of the Poincaré sphere, where θ is the orientation angle. ...
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Evaluation of the two-photon absorption characteristics of GaSb/GaAs quantum rings
... be two-photon excitation, whereby a combination of photo-filling (IB to CB transitions) and emp- tying (VB to IB transitions) of the QR states results in the photo-generation of electron-hole ...Although ...
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