Two-photon absorption and emission studies
Polarised stimulated emission depletion studies of two-photon excited states
... Stimulated emission depletion, vibrational relaxation, two-photon, polarisation, selection ...Stimulated emission depletion (STED) of excited states has proved to be both a valuable tool 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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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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Stimulated emission depletion following two photon excitation
... colour two photon stimulated emission depletion has been successfully demonstrated in fluorescein in both ethylene glycol and methanol solutions using both fully time resolved fluorescence intensity ...
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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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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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Polarization dependence of a GaAs based two photon absorption microcavity photodetector
... 1. These scans were carried out with the average power held constant at 0.15 mW, which is low enough for the detected photocurrent to be dominated by SPA, as shown in Fig. 2(inset), which shows the microcavity detector ...
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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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X-ray Absorption and Emission Studies of Anodic Titania Nanostructures
... in-between. It suggests that rutile structure growth proceeds from bottom to the top at the expense of the nanotubular anatase phase via structural reconstruction. Chapter 4 investigated the anion-doping effect on the ...
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Spontaneous Photon Emission in Cavities
... possible photon path inside the cavity, ...a photon (counted by M) between the atom and the vertex of the ...of two quantization ...the two focal points tends to ...emitted photon ...
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Multi photon absorption limits to heralded single photon sources
... single photon sources based on quantum dots 2 and defects in diamond 3 are being heavily investigated, however they are currently limited due to the inherent randomness of emission direction, large bulk ...
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Single and two photon fluorescence studies of ordered molecular systems
... are two main reasons: firstly, in addition to the electronic degrees o f freedom, a probe molecule possesses quantised rotational and vibrational ...the absorption spectrum can only be resolved by cooling ...
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Femtosecond two-photon absorption spectroscopy of poly(fluorene) derivatives containing benzoselenadiazole and benzothiadiazole
... Materials 2017, 10, 512 9 of 11 to an ICT transition. The later one is also observed along to the one-photon absorption spectrum due to the relaxation of the electric dipole selection rules in ...
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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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Cyclotron emission, absorption, and the two faces of X-ray pulsar A 0535+262
... of emission from the transient XRP A 0535+262, obtained for the first time with the NuSTAR observatory at the very low luminosity ∼ 7 × 10 34 erg s − 1 ...of two broad components peaking around 5–7 keV and ...
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Two Photon Absorption in Nanostructure Wide Band Gap Semiconductor CdS Using Femtosecond Laser
... nonlinear absorption in CdS nanoparticles of dimensions in the range 4 - 50 nm when irradiated with a femtosecond pulsed laser at 800 nm is ...nonlinear absorption coeffi- cients were measured using a fully ...
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All optical sampling based on two photon absorption in a semiconductor microcavity for high speed OTDM
... Keywords: Optical Communications, Optical Time Division Multiplexing, Hybrid WDM/OTDM, Optical Sampling, Two-Photon Absorption, Microcavity 1. HIGH-SPEED OPTICAL MULTIPLEXING TECHNIQUES Due to the ...
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Emission of Thermal Photon in Heavy Ion Collisions
... 2. Emission of Thermal Photon from QGP Various theoretical predictions have been proved, some of the surprises have been found in experimental results and indicate that RHIC and LHC is, indeed, probing a ...
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