High-speed and high-efficiency travelling wave single
... nitride (NbN) nanowires have already successfully been used to perform quantum optical measurements when coupled to onchip photonic devices22, and thus illustrate their potential for non-classical single-photon applications. However, because of limited absorption of incoming photons under vertical i ...
... nitride (NbN) nanowires have already successfully been used to perform quantum optical measurements when coupled to onchip photonic devices22, and thus illustrate their potential for non-classical single-photon applications. However, because of limited absorption of incoming photons under vertical i ...
chapter 2 photons and atoms
... intrinsic angular momentum (or spin)--- its polarization properties. • travels at the speed of light (in vacuum c0) ...
... intrinsic angular momentum (or spin)--- its polarization properties. • travels at the speed of light (in vacuum c0) ...
Top downloaded Optics Express article for March.
... correlator architecture. We also extend the method to multiplex several movies in a single package. We use a Mach-Zehnder interferometer to encrypt experimentally each movie. One arm of the interferometer is the... ...
... correlator architecture. We also extend the method to multiplex several movies in a single package. We use a Mach-Zehnder interferometer to encrypt experimentally each movie. One arm of the interferometer is the... ...
Optical Damage Limits to Pulse Energy From Fibers - AS
... straight fiber with a step index and NA = 0.06 (triangles), and a parabolic-index profile (diamonds), along with the approximate scaling curves given by (11) for the step index and (10) for the parabolic index (solid curves). For reference, the dashed curve is the self-focusing enhancement for a bul ...
... straight fiber with a step index and NA = 0.06 (triangles), and a parabolic-index profile (diamonds), along with the approximate scaling curves given by (11) for the step index and (10) for the parabolic index (solid curves). For reference, the dashed curve is the self-focusing enhancement for a bul ...
www.osa-opn.org 24 | OPN October 2008 Two positively charged
... the oscillating dipole created by the interference of the two parts of the wavefunction—the bound electron wavefunction and the re-collision electron wave packet. In other words, the XUV pulse is a replica of the re-collision electron pulse viewed through the transition moment. The bottom figure on ...
... the oscillating dipole created by the interference of the two parts of the wavefunction—the bound electron wavefunction and the re-collision electron wave packet. In other words, the XUV pulse is a replica of the re-collision electron pulse viewed through the transition moment. The bottom figure on ...
Vanadium Dioxide - Vanderbilt`s ETD Server
... material, and E is the electric field. With small electric fields, only the term containing χ(1) need be considered, but once the electric field becomes sufficiently large, such as a focused laser beam like that used in this experiment, the effects of the higher order susceptibility terms come into ...
... material, and E is the electric field. With small electric fields, only the term containing χ(1) need be considered, but once the electric field becomes sufficiently large, such as a focused laser beam like that used in this experiment, the effects of the higher order susceptibility terms come into ...
Absorption Measurements in Microfluidic Devices using Ring-down Spectroscopy
... due to its very high sensitivity and fast response. However, since many analytes are not naturally fluorescent, labelling protocols may have to be introduced and thereby increase the complexity of the analysis. Here, we present an alternative method that is based on optical absorption, or more speci ...
... due to its very high sensitivity and fast response. However, since many analytes are not naturally fluorescent, labelling protocols may have to be introduced and thereby increase the complexity of the analysis. Here, we present an alternative method that is based on optical absorption, or more speci ...
Low atmospheric density measurement based on Rayleigh
... trations for combustion flows, which are of great guiding significance for a theoretical design and practical application of the high-speed flight vehicle. In particle image velocimetry (PIV) [6], the fluid motion is made visible by adding small tracer particles to infer the flow velocity field. Met ...
... trations for combustion flows, which are of great guiding significance for a theoretical design and practical application of the high-speed flight vehicle. In particle image velocimetry (PIV) [6], the fluid motion is made visible by adding small tracer particles to infer the flow velocity field. Met ...
Multifilamentation transmission through fog
... ⫻ 104 cm−3, so that the photon mean free path 共MFP兲 is about 5 m. Here, MFP is the average longitudinal length LM , along which an optical object of radius r will collide a droplet of radius R, L M = 1 / 共r + R兲2N. For an optical ray, we have r → 0, so that L M = 5 m guarantees a weak interaction o ...
... ⫻ 104 cm−3, so that the photon mean free path 共MFP兲 is about 5 m. Here, MFP is the average longitudinal length LM , along which an optical object of radius r will collide a droplet of radius R, L M = 1 / 共r + R兲2N. For an optical ray, we have r → 0, so that L M = 5 m guarantees a weak interaction o ...
Single photon detection based devices and techniques for pulsed
... range of a target can be calculated based on the measured flight time of a laser pulse to and from the target. The amount of photons in an optical pulse sent by a TOF rangefinder to a target is typically in the range from millions to billions (for example a commonly used 10 W, 3 ns, 850 nm laser pul ...
... range of a target can be calculated based on the measured flight time of a laser pulse to and from the target. The amount of photons in an optical pulse sent by a TOF rangefinder to a target is typically in the range from millions to billions (for example a commonly used 10 W, 3 ns, 850 nm laser pul ...
Beyond Snel`s law: Refraction of a nano-beam of light.
... light laser beam with a wavelength of 53171.8 nm from a nanowire. Although not specifically emphasized, the width of the beam from the nanowire is estimated to be not larger than 50 nm based on the results in Fig. 3 of Nakayama et al. [8]. Also, Oulton et al. [9] reported an experimental demonstratio ...
... light laser beam with a wavelength of 53171.8 nm from a nanowire. Although not specifically emphasized, the width of the beam from the nanowire is estimated to be not larger than 50 nm based on the results in Fig. 3 of Nakayama et al. [8]. Also, Oulton et al. [9] reported an experimental demonstratio ...
Viscosity dependence of optical limiting in carbon black
... nanosecond pulses, the lower the thermal conductivity of the solvent 共see Table 1兲,15 the lower the limiting onset, and the steeper the slope of the limiting curve. It is clear from Fig. 2共a兲 that, by use of single shot, all three samples provide adequate limitation of the output over the entire ran ...
... nanosecond pulses, the lower the thermal conductivity of the solvent 共see Table 1兲,15 the lower the limiting onset, and the steeper the slope of the limiting curve. It is clear from Fig. 2共a兲 that, by use of single shot, all three samples provide adequate limitation of the output over the entire ran ...
V807 -Photon-Counting Avalanche Photodiodes – A Primer
... Thus, the instantaneous rate of absorption in a single detector under uniform illumination will fluctuate randomly from moment to moment, even though the average rate is determined by the incident optical power level.8 This irregularity in the timing of photon absorption events constitutes a type of ...
... Thus, the instantaneous rate of absorption in a single detector under uniform illumination will fluctuate randomly from moment to moment, even though the average rate is determined by the incident optical power level.8 This irregularity in the timing of photon absorption events constitutes a type of ...
Photonic laser thruster
A photonic laser thruster is an amplified laser thruster that generates thrust directly from the laser photon momentum, rather than laser-heating propellant. The concept of single-bounce laser-pushed lightsails that utilize the photon momentum was first developed in the 1960s, however, its conversion of laser power to thrust is highly inefficient, thus has been considered impractical. Over 50 years, there had been numerous theoretical and experimental efforts to increase the conversion efficiency by recycling photons, bouncing them repetitively between two reflective mirrors in an empty optical cavity, without success. In December 2006, Young Bae successfully solved this problem and demonstrated the conversion efficiency enhancement by a factor of 100 and a photon thrust of 35 micronewtons by putting the laser energizing media between the two mirrors as in typical lasers, and the photonic laser thruster was born. In August 2015, the photonic laser thruster was demonstrated to increase the conversion efficiency enhancement by a factor over 1,000 and to achieve a photon thrust of 3.5 millinewtons at Y.K. Bae Corporation. In addition, Propelling, slowing and stopping of a small satellite, 1U CubeSat, in simulated zero-gravity were demonstrated. The photonic laser thruster was initially developed for use in nanometer precision spacecraft formation, for forming ultralarge space telescopes and radars. The photonic laser thruster is currently developed for high-precision and high-speed maneuver of small spacecraft, such as formation flying, orbit adjustments, drag compensation, and rendezvous and docking. The photonic laser thruster can be used for beaming thrust from a conventional heavy resource vehicle to a more expensive & lightweight mission vehicle, similar to tankers in aerial refueling.The practical usage of the photonic laser thruster for main space propulsion would require extremely high laser powers and overcoming technological challenges in achieving the laser power and fabricating the required optics. Photonic laser thrusters have a very high specific impulse, and can permit spacecraft reach much higher speeds than with conventional rockets, which are limited by the Tsiolkovsky rocket equation. If the photonic laser thruster is scalable for the use in such main space propulsion, multiple photonic laser thrusters can be used to construct a 'photonic railway' that has been proposed as a potential permanent transport infrastructure for interplanetary or interstellar commutes, allowing the transport craft themselves to carry very little fuel.