Introduction to THz Wave Photonics
... of carriers. However, most traditional RF sources cannot generate high-frequency radiation above several hundred GHz because the motion of the carrier cannot follow the speed of THz oscillation in such a device. Except for a few mechanisms such as blackbody radiation, Bremsstrahlung, or synchrotron ...
... of carriers. However, most traditional RF sources cannot generate high-frequency radiation above several hundred GHz because the motion of the carrier cannot follow the speed of THz oscillation in such a device. Except for a few mechanisms such as blackbody radiation, Bremsstrahlung, or synchrotron ...
Soliton Generation and Control in Engineered Materials Olga Borovkova
... solitons in settings with spatially inhomogeneous linear refractive index, nonlinearity, gain or absorption, is the subject of this PhD Thesis. We address stable conservative fundamental and multipole solitons in complex engineered materials with an inhomogeneous linear refractive ...
... solitons in settings with spatially inhomogeneous linear refractive index, nonlinearity, gain or absorption, is the subject of this PhD Thesis. We address stable conservative fundamental and multipole solitons in complex engineered materials with an inhomogeneous linear refractive ...
MODELLING OF PHOTONIC COMPONENTS BASED ON ÷(3) NONLINEAR PHOTONIC CRYSTALS Ivan Maksymov
... defects introduced, for instance, by removing a row of scatterers. In addition, the plane wave expansion method is used as an auxiliary tool to calculate linear dispersion characteristics with the purpose of validating the FDTD-based approach. Secondly, another FDTD-based approach known in the liter ...
... defects introduced, for instance, by removing a row of scatterers. In addition, the plane wave expansion method is used as an auxiliary tool to calculate linear dispersion characteristics with the purpose of validating the FDTD-based approach. Secondly, another FDTD-based approach known in the liter ...
Experimental Investigation of Photonic Mixer Device and
... most important measurement techniques, the 3D-ranging systems based on time-offlight (TOF) principle are nowadays intensively investigated. Despite of a large variety of 3D TOF ranging system concepts, the growing requirements in applications for 3Dvision have seldom been really satisfied. Either ad ...
... most important measurement techniques, the 3D-ranging systems based on time-offlight (TOF) principle are nowadays intensively investigated. Despite of a large variety of 3D TOF ranging system concepts, the growing requirements in applications for 3Dvision have seldom been really satisfied. Either ad ...
chapter 4 starfish - Grupo de Óptica
... This thesis is devoted to the development of a technique for the measurement of the spatiotemporal amplitude and phase of ultrashort laser pulses and its applications. The core of the thesis is divided into three parts, which correspond to the presentation of the technique (Part I), its applications ...
... This thesis is devoted to the development of a technique for the measurement of the spatiotemporal amplitude and phase of ultrashort laser pulses and its applications. The core of the thesis is divided into three parts, which correspond to the presentation of the technique (Part I), its applications ...
High Contrast Gratings for Integrated Optoelectronics
... reflectivity and field intensity profile. (a) Comparison of HCG reflectivity spectrum calculated by analytical solution (red) and RCWA (blue). (b) Comparison of HCG field intensity profile (|Ey|2) calculated by analytical solution and FDTD. The white boxes indicate the HCG bars. .................... ...
... reflectivity and field intensity profile. (a) Comparison of HCG reflectivity spectrum calculated by analytical solution (red) and RCWA (blue). (b) Comparison of HCG field intensity profile (|Ey|2) calculated by analytical solution and FDTD. The white boxes indicate the HCG bars. .................... ...
Scanning angle total internal reflection Raman spectroscopy and
... Fresnel factors (Tx, Ty, and Tz) describe the amplification factor of the electric field at the prism sample interface where xy is the sample plane and z extends perpendicularly from the interface. Parallel (p-) polarized incident light results in electric field oscillations in the x and z direction ...
... Fresnel factors (Tx, Ty, and Tz) describe the amplification factor of the electric field at the prism sample interface where xy is the sample plane and z extends perpendicularly from the interface. Parallel (p-) polarized incident light results in electric field oscillations in the x and z direction ...
CRANFIELD UNIVERSITY Edouard Berrocal MULTIPLE
... through a typical hollow cone water spray. Versatile usage of this model is exemplified with its applications to image transfer through turbid media, correction of experimental Beer-Lambert measurements, the study of light scattering by single particles in the farfield region, and to simulate the pr ...
... through a typical hollow cone water spray. Versatile usage of this model is exemplified with its applications to image transfer through turbid media, correction of experimental Beer-Lambert measurements, the study of light scattering by single particles in the farfield region, and to simulate the pr ...
Aspects of femtosecond pulse shape transfer via di erence
... by using specic input angles and so manipulating the eective refractive index of the nonlinear material for the input and generated pulses. It was found that it is possible to temporally broaden or narrow the generated pulse relative to the input pulses. We compare the developed numerical model to ...
... by using specic input angles and so manipulating the eective refractive index of the nonlinear material for the input and generated pulses. It was found that it is possible to temporally broaden or narrow the generated pulse relative to the input pulses. We compare the developed numerical model to ...
Investigating Naturally Occurring 3
... characterisation of these contrasting structures. The two contrasting photonic mechanisms employed by E. magnificus were found to produce a similar optical response in terms of angle-independent colour whilst reflecting different coloured hues. Parides sesostris is a species of butterfly that uses a ...
... characterisation of these contrasting structures. The two contrasting photonic mechanisms employed by E. magnificus were found to produce a similar optical response in terms of angle-independent colour whilst reflecting different coloured hues. Parides sesostris is a species of butterfly that uses a ...
Nonlinear pulse compression DISSERTATION
... in the Near-InfraRed (NIR) to the Mid-InfraRed (MIR) spectral region. By combining pulses at a centre wavelength of 800 nm and their second harmonic in an argon-filled hollow-core fibre, we demonstrate near-infrared pulses, peaked at 1.4 µm, with 5 µJ energy and 45 fs duration at the fibre output. T ...
... in the Near-InfraRed (NIR) to the Mid-InfraRed (MIR) spectral region. By combining pulses at a centre wavelength of 800 nm and their second harmonic in an argon-filled hollow-core fibre, we demonstrate near-infrared pulses, peaked at 1.4 µm, with 5 µJ energy and 45 fs duration at the fibre output. T ...
generation and propagation of optical vortices
... Optical vortices are singularities in phase fronts of laser beams. They are characterized by a dark core whose size (relative to the size of the background beam) may dramatically affect their behavior upon propagation. Previously, only large-core vortices have been extensively studied. The object of ...
... Optical vortices are singularities in phase fronts of laser beams. They are characterized by a dark core whose size (relative to the size of the background beam) may dramatically affect their behavior upon propagation. Previously, only large-core vortices have been extensively studied. The object of ...
azu_td_9829319_sip1_
... direction and recommend that it be accepted as fulfilling the dissertation requirement. ...
... direction and recommend that it be accepted as fulfilling the dissertation requirement. ...
Oblique Incidence
... this property is in wireless communications where the effect of the ground reflections causes the power of the propagating radio wave to attenuate with the fourth (instead of the second) power of the distance, thus, limiting the propagation range (see Example 22.3.5.) We note also that Eqs. (7.4.1) a ...
... this property is in wireless communications where the effect of the ground reflections causes the power of the propagating radio wave to attenuate with the fourth (instead of the second) power of the distance, thus, limiting the propagation range (see Example 22.3.5.) We note also that Eqs. (7.4.1) a ...
thesis_draft_4
... Figure 4.2. Micrographs of lactose crystals obtained from a gelatin-gel (43 wt% lactose, 1.5 wt% gelatin) after 24 hours at 25°C(a) 4X (scale bar = 500 μm) and (b) 20X (scale bar = 50 μm) magnifications..........................................................................54 Figure 4.3. XRD patte ...
... Figure 4.2. Micrographs of lactose crystals obtained from a gelatin-gel (43 wt% lactose, 1.5 wt% gelatin) after 24 hours at 25°C(a) 4X (scale bar = 500 μm) and (b) 20X (scale bar = 50 μm) magnifications..........................................................................54 Figure 4.3. XRD patte ...
Fiber optic Fabry-Perot interferometer for
... Since the publication of the paper where the first fiber Fabry-Perot interferometer(FFPI) for sensing applications was demonstrated, more than thirty years ago, a number of configurations of this optical fiber interferometer have been proposed and used to detect physical, chemical and biological var ...
... Since the publication of the paper where the first fiber Fabry-Perot interferometer(FFPI) for sensing applications was demonstrated, more than thirty years ago, a number of configurations of this optical fiber interferometer have been proposed and used to detect physical, chemical and biological var ...
Manipulating Bose-Einstein condensates with laser light Shin Inouye
... Stimulated, two-photon Bragg scattering was used for spectroscopic measurement of the mean-field energy and of the intrinsic momentum uncertainty of the condensate. The high momentum and energy resolution of this method allowed the determination of the coherence length of the condensate, which was sh ...
... Stimulated, two-photon Bragg scattering was used for spectroscopic measurement of the mean-field energy and of the intrinsic momentum uncertainty of the condensate. The high momentum and energy resolution of this method allowed the determination of the coherence length of the condensate, which was sh ...
reflectance measurement and modelling of high reflectivity
... Distributed Bragg Reflector (DBR) is becoming an important component in optoelectronic devices particularly the quarter-wave semiconductor DBR because of its ease of monolithic integration, hence eliminating the requirement for post-growth processing and simplifying the design. The nature of the int ...
... Distributed Bragg Reflector (DBR) is becoming an important component in optoelectronic devices particularly the quarter-wave semiconductor DBR because of its ease of monolithic integration, hence eliminating the requirement for post-growth processing and simplifying the design. The nature of the int ...
Displacement laser interferometry with sub-nanometer
... As a result the Jones model combined with the setups for measurement of the polarization properties form a practical tool for designers of interferometer systems and optical components. This tool enables the designer to choose the right components and alignment tolerances for a practical setup with ...
... As a result the Jones model combined with the setups for measurement of the polarization properties form a practical tool for designers of interferometer systems and optical components. This tool enables the designer to choose the right components and alignment tolerances for a practical setup with ...
pdf
... two split condensates was shown to be reproducible. Microfabricated atom chips were developed with prospect for chip-based confined-atom interferometry. The same dynamical splitting scheme was implemented in a purely magnetic double-well potential on an atom chip and interference of two split conden ...
... two split condensates was shown to be reproducible. Microfabricated atom chips were developed with prospect for chip-based confined-atom interferometry. The same dynamical splitting scheme was implemented in a purely magnetic double-well potential on an atom chip and interference of two split conden ...
Ray-optics cloaking devices for large objects in incoherent natural light
... hide objects roughly one wavelength large (an optical wavelength equates to the scale of single-celled organisms) have been experimentally demonstrated in both the microwave4,7,10 and optical spectrum8,9,11. Successful attempts have also been made to allow the cloaking technology to be used at much ...
... hide objects roughly one wavelength large (an optical wavelength equates to the scale of single-celled organisms) have been experimentally demonstrated in both the microwave4,7,10 and optical spectrum8,9,11. Successful attempts have also been made to allow the cloaking technology to be used at much ...
Coherent Control of Atoms and Molecules
... must take a large share of the credit. They have been friends and mentors to me, allowing me to explore just about anything that interested me. In fact, we even did a few of Henry's famous "one-day" experiments in more-or-less a day. At the same time gently nudging me in the direction they, in their ...
... must take a large share of the credit. They have been friends and mentors to me, allowing me to explore just about anything that interested me. In fact, we even did a few of Henry's famous "one-day" experiments in more-or-less a day. At the same time gently nudging me in the direction they, in their ...
Fundamentals of Light Microscopy and Electronic Imaging
... economy and esthetic beauty of optical laws and principles. If carried out, the demonstrations and exercises also offer opportunities to become acquainted with new biological specimens that the reader may not have confronted or seen before by a new mode of light microscopy. Lists of materials, proce ...
... economy and esthetic beauty of optical laws and principles. If carried out, the demonstrations and exercises also offer opportunities to become acquainted with new biological specimens that the reader may not have confronted or seen before by a new mode of light microscopy. Lists of materials, proce ...
STED Microscopy
... in decreased fluorophore populations in the singlet state system and correspondingly lower fluorescence signal. Furthermore, photobleaching is accelerated for molecules in the triplet state. Using lasers with lower pulse repetition rates (1 MHz range) results therefore not only in much lower Psat valu ...
... in decreased fluorophore populations in the singlet state system and correspondingly lower fluorescence signal. Furthermore, photobleaching is accelerated for molecules in the triplet state. Using lasers with lower pulse repetition rates (1 MHz range) results therefore not only in much lower Psat valu ...
Phase-contrast X-ray imaging
Phase-contrast X-ray imaging (PCI) or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images. Standard X-ray imaging techniques like radiography or computed tomography (CT) rely on a decrease of the X-ray beam's intensity (attenuation) when traversing the sample, which can be measured directly with the assistance of an X-ray detector. In PCI however, the beam's phase shift caused by the sample is not measured directly, but is transformed into variations in intensity, which then can be recorded by the detector.In addition to producing projection images, PCI, like conventional transmission, can be combined with tomographic techniques to obtain the 3D distribution of the real part of the refractive index of the sample. When applied to samples that consist of atoms with low atomic number Z, PCI is more sensitive to density variations in the sample than conventional transmission-based X-ray imaging. This leads to images with improved soft tissue contrast.In the last several years, a variety of phase-contrast X-ray imaging techniques have been developed, all of which are based on the observation of interference patterns between diffracted and undiffracted waves. The most common techniques are crystal interferometry, propagation-based imaging, analyzer-based imaging, edge-illumination and grating-based imaging (see below).