Two-photon absorption (TPA)
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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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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Enhanced two-photon absorption of ligated silver and gold nanoclusters: theoretical and experimental assessments
... Since the pioneering work of Goodson and co-workers 49 , who were the first to reveal giant TPA cross-sections for Au 25 (SR) 18 nanoclusters, several works have been reported on the two- photon ...
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All optical sampling based on two photon absorption in a semiconductor microcavity for high speed OTDM
... 3. Two-Photon Absorption via Intermediate Virtual State The TPA process needs to be distinguished from a two-step absorption process in which photons are absorbed individually due to ...
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Chromatic dispersion monitoring for high speed WDM systems using two photon absorption in a semiconductor microcavity
... or two nonlinearly chirped FBG used in tandem to mitigate third order dispersion effects ...of two-photon absorption (TPA) in a specially designed microcavity is utilized for high-speed, wave- ...
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Acceptance angle influence on optimum incident spot size for high finesse microcavity two photon absorption photodetectors
... cavity, two-photon absorption (TPA). I. I NTRODUCTION T WO-PHOTON absorption (TPA) in semiconductors has recently received interest as it can be employed to char- acterize very short ...
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Research Article Performance of All-Optical XNOR Gate Based on Two-Photon Absorption in Semiconductor Optical Amplifiers
... work, we propose to address this critical issue by exploiting two-photon absorption (TPA) in SOAs, which are placed in the two arms of MZI operated in probe-dual pump mode. According to ...
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Effect of Substitution Site on Two-Photon Absorption and Excited States Properties of Lipid Droplets Detection NAPBr Dyes: a Theoretical Perspective
... One-photon absorption (OPA), and one-photon emis- sion (OPE), two-photon absorption (TPA), and non- radiative transition are ...
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Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy
... until photon bunching on such ultra- fast timescales was observed due to limited detector ...exploited two-photon absorption in a semiconductor in combination with an interferometric ...
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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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Femtosecond two-photon absorption spectroscopy of poly(fluorene) derivatives containing benzoselenadiazole and benzothiadiazole
... As a matter of fact, 2PA cross sections in semiconductor polymers are closely related to the effective numbers of π-electrons [18], the π-conjugation length [19], and the charge separation induced by introducing ...
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Competition between sub-bandgap linear detection and degenerate two-photon absorption in gallium arsenide photodiodes
... achieved two I-P characteristics of the diode while measuring the temperature by a PT100 thermo-resistor glued to the photodiode (see ...by two-photon absorption only occurs when the pulse is ...
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Theory of direct and indirect effect of two-photon absorption on nonlinear optical losses in high power semiconductor lasers
... [19] B. Ryvkin and E. Avrutin, "Heating-induced carrier accumulation in the optical confinement layer and the output power in broadened symmetric and narrow asymmetric waveguide laser diodes," Journal of Applied Physics, ...
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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
... that two-photon absorption in a specially designed semiconductor microcavity is an ideal candidate for optical signal processing applications such as autocorrelation, sampling, and demultiplexing in ...
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Two photon absorption in semiconductor micro cavities
... into two beams and after one beam has been temporally delayed the beams from both arms of the interferometer are recombined at the ...the two co-parallel beams can be ...the two parallel beams ...
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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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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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Photoluminescence upconversion at interfaces driven by a sequential two-photon absorption mechanism
... the two beams were coincident at the same spot on the ...a photon energy of ...the two upconversion PL spectra demonstrate that the unchopped beam provided additional UPL signal, with a peak ...
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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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Two Photon Absorption in Nanostructure Wide Band Gap Semiconductor CdS Using Femtosecond Laser
... nonlinear absorption coefficient was measured by fully computerized the z- scan ...ear absorption coefficient for the nanocrystallites is one order of magnitude higher than that of the bulk CdS ma- ...
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