Synchronization of Micromechanical Oscillators Using Light
... narrowing and amplitude growth. This behavior have been theoretically shown to be a Hopf bifurcation of the optomechanical oscillator [20, 21, 36]. The lower amplitude peak before the bifurcation is due to amplified thermal Brownian motion of the cavity mechanical mode. It is clear that each cavity ...
... narrowing and amplitude growth. This behavior have been theoretically shown to be a Hopf bifurcation of the optomechanical oscillator [20, 21, 36]. The lower amplitude peak before the bifurcation is due to amplified thermal Brownian motion of the cavity mechanical mode. It is clear that each cavity ...
Nonlinear optics in daily life
... Practical optical parametric oscillators (OPOs) have come of age with the advent of ultrashort pulses for high peak power, new and effective nonlinear crystals, and periodic poling for phase-matching. Robust, turn-key and/or computer-operated, OPO’s are now widely used for spectroscopy, as pointed o ...
... Practical optical parametric oscillators (OPOs) have come of age with the advent of ultrashort pulses for high peak power, new and effective nonlinear crystals, and periodic poling for phase-matching. Robust, turn-key and/or computer-operated, OPO’s are now widely used for spectroscopy, as pointed o ...
Dual-color total internal reflection fluorescence cross
... correlation spectroscopy 共FCCS兲 represents a further development of fluctuation spectroscopy, which achieves a significantly improved selectivity and applicability.8 FCCS institutes two differently colored labels and realizes the distinction between coinciding and separated occurrence of these label ...
... correlation spectroscopy 共FCCS兲 represents a further development of fluctuation spectroscopy, which achieves a significantly improved selectivity and applicability.8 FCCS institutes two differently colored labels and realizes the distinction between coinciding and separated occurrence of these label ...
Optically Enhanced Magnetic Resonance
... A method for the optical detection of magnetic resonance transitions that does not directly rely on the conservation of angular momentum is laser magnetic resonance. It uses transitions between states that differ both in their electronic or vibrational and angular momentum quantum numbers. Transitio ...
... A method for the optical detection of magnetic resonance transitions that does not directly rely on the conservation of angular momentum is laser magnetic resonance. It uses transitions between states that differ both in their electronic or vibrational and angular momentum quantum numbers. Transitio ...
Sub-THz Electron Spin Resonance spectroscopy based on a Martin
... resonance signals. First, SW can be diminished by careful adjustment of the incoming beam to the centers of every aperture and by optimal collimation of the Gaussian beam (Fig. 3), in order to avoid scattering and Fresnel diffraction. Second, since mirror reflections cause no change in circularity — ...
... resonance signals. First, SW can be diminished by careful adjustment of the incoming beam to the centers of every aperture and by optimal collimation of the Gaussian beam (Fig. 3), in order to avoid scattering and Fresnel diffraction. Second, since mirror reflections cause no change in circularity — ...
Measurement of the Number of Atoms in a Magneto
... For this either ω has to be well-known or the image with maximum absorption is taken, where ω = ω0 . The latter can only be done if the range of the camera is large enough. In reality, the camera as well as the image-capturing process are often limited by an 8-bit-resolution. Then there are only 256 ...
... For this either ω has to be well-known or the image with maximum absorption is taken, where ω = ω0 . The latter can only be done if the range of the camera is large enough. In reality, the camera as well as the image-capturing process are often limited by an 8-bit-resolution. Then there are only 256 ...
Multi-photon absorption and third-order
... length; ω0 is the beam waist at the focal point (z = 0), λ is the laser wavelength; effective path lengths in the sample for three-photon absorption (3PA) and four-photon absorption (4PA) are given as Leff′ = [1-exp(−2α0L)]/2α0 and Leff′′ = [1-exp(−3α0L)]/3α0 respectively. To clarify, the α0 is the ...
... length; ω0 is the beam waist at the focal point (z = 0), λ is the laser wavelength; effective path lengths in the sample for three-photon absorption (3PA) and four-photon absorption (4PA) are given as Leff′ = [1-exp(−2α0L)]/2α0 and Leff′′ = [1-exp(−3α0L)]/3α0 respectively. To clarify, the α0 is the ...
Biochemical sensors based on polymer microrings with sharp
... reflecting elements in the waveguide that couples the microresonator. This structure can produce a sharp asymmetric Fano-resonance line shape, in which the slope between the zero and the unity transmission is greatly enhanced compared with that of a conventional microring resonator. Such a Fano-reso ...
... reflecting elements in the waveguide that couples the microresonator. This structure can produce a sharp asymmetric Fano-resonance line shape, in which the slope between the zero and the unity transmission is greatly enhanced compared with that of a conventional microring resonator. Such a Fano-reso ...
K. S. Al Mugren, Y. El Sayed, H. Shoukry, A. El Taher
... X-ray diffraction spectroscopy has been performed by using, (Schimadzu Labx XRD6000) using CuK radiation at 40 kV,2θ between 5 to 90°. The calorimetric measurements of prepared glasses were carried out in Setaram (DSC 131 Evo). Temperature and energy calibrations of the instrument were performed us ...
... X-ray diffraction spectroscopy has been performed by using, (Schimadzu Labx XRD6000) using CuK radiation at 40 kV,2θ between 5 to 90°. The calorimetric measurements of prepared glasses were carried out in Setaram (DSC 131 Evo). Temperature and energy calibrations of the instrument were performed us ...
TDLS98AbBook
... In the mid infrared spectral region between 3 and 30 µm the majority of atmospheric relevant gases have pronounced rotational-vibrational absorption lines. Prerequisite for the use of these transitions for trace gas detection is the precise knowledge of line parameters like position, intensity, broa ...
... In the mid infrared spectral region between 3 and 30 µm the majority of atmospheric relevant gases have pronounced rotational-vibrational absorption lines. Prerequisite for the use of these transitions for trace gas detection is the precise knowledge of line parameters like position, intensity, broa ...
A Reliable Method For Extraction Of Material Parameters In
... extends from a few tens of gigahertz to a few terahertz. Using ultrashort electromagnetic pulses, terahertz spectroscopy gives access to the complex refractive index of a wide variety of materials, such as dielectrics [1], semiconductors [2], liquids [3], and superconductors [4]. For parameters extr ...
... extends from a few tens of gigahertz to a few terahertz. Using ultrashort electromagnetic pulses, terahertz spectroscopy gives access to the complex refractive index of a wide variety of materials, such as dielectrics [1], semiconductors [2], liquids [3], and superconductors [4]. For parameters extr ...
Final Report DURIP AFOSR Grant FA9550-06-1
... 200 mJ, 20 ns pulse time, 10 MW, 193 nm wavelength UV excimer laser can now produce focused power fluxes of S=108-11 W/cm2 that are comparable to and can exceed current high power microwave power breakdown fluxes. Research literature has shown that microwave, laser, and radiofrequency air breakdown ...
... 200 mJ, 20 ns pulse time, 10 MW, 193 nm wavelength UV excimer laser can now produce focused power fluxes of S=108-11 W/cm2 that are comparable to and can exceed current high power microwave power breakdown fluxes. Research literature has shown that microwave, laser, and radiofrequency air breakdown ...
Millipede Memory
... In any case, an emerging technology being considered as a serious candidate to replace an existing but limited technology must offer long-term perspectives. For instance, the silicon microelectronics and storage industries are huge and require correspondingly enormous investments, which makes them l ...
... In any case, an emerging technology being considered as a serious candidate to replace an existing but limited technology must offer long-term perspectives. For instance, the silicon microelectronics and storage industries are huge and require correspondingly enormous investments, which makes them l ...
Ultrashort-Pulse Generation and Ultrafast Phenomena
... mirrors developed in our group, provide high reflectivity and well controlled dispersion over 400 nm in the case of single mirrors or even over one octave using specially matched mirror pairs. These components are a prerequisite for miniaturized ultrabroadband femtosecond lasers necessary for biomed ...
... mirrors developed in our group, provide high reflectivity and well controlled dispersion over 400 nm in the case of single mirrors or even over one octave using specially matched mirror pairs. These components are a prerequisite for miniaturized ultrabroadband femtosecond lasers necessary for biomed ...
Super-resolution Microscopy
... spaced point sources are imaged at different times. That is, imagine two PSFs that cannot be otherwise distinguished but each is observed at a different time (Fig. 3D). This methodology of “sequential” imaging at different times forms the basis of the most recent and successful superresolution micro ...
... spaced point sources are imaged at different times. That is, imagine two PSFs that cannot be otherwise distinguished but each is observed at a different time (Fig. 3D). This methodology of “sequential” imaging at different times forms the basis of the most recent and successful superresolution micro ...
High Speed Silicon based optical modulators
... for the single drive we obtained 11pj/bit and in dual drive 4.5pj/bit. We have also theoretically analysed the chirp from a silicon modulator in both dual drive and single drive configurations (figure 1), taking into account the experimental DC and high speed characteristics of the ...
... for the single drive we obtained 11pj/bit and in dual drive 4.5pj/bit. We have also theoretically analysed the chirp from a silicon modulator in both dual drive and single drive configurations (figure 1), taking into account the experimental DC and high speed characteristics of the ...
JASA_2012 - Institut Langevin
... methods have been developed.3 For example, Lamb waves have been used for defect detection in pipe-lines.4 Compared with bulk acoustic waves, the guided waves are more suitable for long-range inspection of thin hollow cylinders. In this case, axially and circumferentially propagating guided waves mus ...
... methods have been developed.3 For example, Lamb waves have been used for defect detection in pipe-lines.4 Compared with bulk acoustic waves, the guided waves are more suitable for long-range inspection of thin hollow cylinders. In this case, axially and circumferentially propagating guided waves mus ...
Near-resonant spatial images of confined Bose-Einstein condensates in a 4-Dee... Lene Vestergaard Hau, B. D. Busch, Chien Liu,
... Ref. @19#. The final rf frequency determines the final temperature, number of atoms, and condensate fraction of the cloud. To minimize trap loss, chamber pressure is kept below 1310211 Torr. In this Rapid Communication we are concerned with demonstrating that detailed quantitative spatial informatio ...
... Ref. @19#. The final rf frequency determines the final temperature, number of atoms, and condensate fraction of the cloud. To minimize trap loss, chamber pressure is kept below 1310211 Torr. In this Rapid Communication we are concerned with demonstrating that detailed quantitative spatial informatio ...
SPECTRAL REFLECTANCES OF LOG ENDS FOR CAMERA BASED ANNUAL Marjanen Kalle
... vibrations set limitations to hardware used. The change of the illumination during the day [3] combined with the mechanical vibrations degrades the image quality [9] unless special care is taken. The camera based measurements provide methods for non-intrusive quality analysis. The images taken from ...
... vibrations set limitations to hardware used. The change of the illumination during the day [3] combined with the mechanical vibrations degrades the image quality [9] unless special care is taken. The camera based measurements provide methods for non-intrusive quality analysis. The images taken from ...
Comprehensive and reliable diagnostics for the corona of laser
... higher plasma density, and longer wavelength is preferred to obtain a significant phase shift in the under-dense region. Relatively large-scale plasma size is required for efficient EUVL sources [9] and laser fusion research, and there is a steep gradient in density profile. The refraction induced b ...
... higher plasma density, and longer wavelength is preferred to obtain a significant phase shift in the under-dense region. Relatively large-scale plasma size is required for efficient EUVL sources [9] and laser fusion research, and there is a steep gradient in density profile. The refraction induced b ...
E. Ippen
... Figure 18: Timing recovery following a step-wise excitation, phase modulation. In contrast to the case of AM, timing is not restored directly by PM. Mistimed pulses first experience a shift in frequency that converts to retiming through group-velocity dispersion (GVD). Upon successive round trips, t ...
... Figure 18: Timing recovery following a step-wise excitation, phase modulation. In contrast to the case of AM, timing is not restored directly by PM. Mistimed pulses first experience a shift in frequency that converts to retiming through group-velocity dispersion (GVD). Upon successive round trips, t ...
THE BASIC PRINCIPLES OF LASER TECHNOLOGY, USES AND
... thousand times brighter than the sun, burst forth a thin red light, a perfectly parallel monochromatic beam. Maiman and his assistants were silent for some time, enthralled by the beauty of this spectacle… ‘Einstein was right’ he murmured, ‘light can be concentrated and coherent.” The device produce ...
... thousand times brighter than the sun, burst forth a thin red light, a perfectly parallel monochromatic beam. Maiman and his assistants were silent for some time, enthralled by the beauty of this spectacle… ‘Einstein was right’ he murmured, ‘light can be concentrated and coherent.” The device produce ...
Construction of a femtosecond mode
... There are several methods by which pulsed output can be generated, for example Qswitching and mode-locking [7]. By now the most advanced technique for ultarshort pulse generating is Kerr-lens mode- locking in solid-state lasers. This technique can provide sub-10 fs lasing and does not require very c ...
... There are several methods by which pulsed output can be generated, for example Qswitching and mode-locking [7]. By now the most advanced technique for ultarshort pulse generating is Kerr-lens mode- locking in solid-state lasers. This technique can provide sub-10 fs lasing and does not require very c ...
Thermal Lensing in a Nd:YAG Laser Rod
... Theoretical and experimental results are reported on the thermal lensing effect caused by the radial thermal gradient present in optically pumped Nd: YAG laser rods. The presented theory is in agreement with the experimental observations. The results reveal that a Nd:YAG rod under pumped light becom ...
... Theoretical and experimental results are reported on the thermal lensing effect caused by the radial thermal gradient present in optically pumped Nd: YAG laser rods. The presented theory is in agreement with the experimental observations. The results reveal that a Nd:YAG rod under pumped light becom ...
Activities and Findings - LIGO
... The current design for Advanced LIGO detectors includes gravitational wave signal recycling. This configuration allows a modification in the frequency response of the interferometer and offers the possibility of a tailored response for a targeted source. The increase in the complexity of the interfe ...
... The current design for Advanced LIGO detectors includes gravitational wave signal recycling. This configuration allows a modification in the frequency response of the interferometer and offers the possibility of a tailored response for a targeted source. The increase in the complexity of the interfe ...
AFM-IR
AFM-IR refers to atomic force microscope (AFM) based infrared (IR) spectroscopy. AFM-IR is a technique for chemical analysis of samples at nanoscale spatial resolution. AFM-IR is related to techniques including Tip-Enhanced Raman Spectroscopy (TERS) and scanning near-field optical microscopy (SNOM) and other methods of vibrational analysis with scanning probe microscopy. The AFM-IR technique uses a sharp tip of an AFM probe to measure the absorption of infrared light by a sample. Recording the amount of IR absorption as a function of wavelength or wavenumber creates nanoscale IR absorption spectra, which can be used to chemically characterize and even identify unknown materials. Recording the IR absorption as a function of position can be used to create chemical composition maps that show the spatial distribution of different chemical components. AFM-IR can overcome the diffraction limit that limits the spatial resolution of conventional infrared microscopy and microspectroscopy to the scale of several microns. AFM-IR can achieve spatial resolution down to around 20 nm, limited in some case only by the sharpness of the AFM probe tip and sensitivity down to the scale of molecular monolayers.