Optics of Gaussian Beams
... beams of light travel through optical systems. We shall see that special solutions to the electromagnetic wave equation exist that take the form of narrow beams – called Gaussian beams. These beams of light have a characteristic radial intensity profile whose width varies along the beam. Because the ...
... beams of light travel through optical systems. We shall see that special solutions to the electromagnetic wave equation exist that take the form of narrow beams – called Gaussian beams. These beams of light have a characteristic radial intensity profile whose width varies along the beam. Because the ...
Electrical Excitation of Surface Plasmons
... interaction between electrons and photons is weak for @! me c2 , since energy and momentum cannot be simultaneously conserved. One way to bridge this mismatch is to employ polariton modes (plasmons). They have the same energy as free space photons but arbitrarily high spatial localization (hence m ...
... interaction between electrons and photons is weak for @! me c2 , since energy and momentum cannot be simultaneously conserved. One way to bridge this mismatch is to employ polariton modes (plasmons). They have the same energy as free space photons but arbitrarily high spatial localization (hence m ...
The Intermediate Optical System of Laser
... given in the Melles Griot catalogue (Chapter 1, 1999); the performance of real lenses is found in Melles Griot, Chapters 6 and 11, this volume). One goal of the optical system is to generate a light spot in the image plane that is smaller than actually required. This is equivalent to overfilling the ...
... given in the Melles Griot catalogue (Chapter 1, 1999); the performance of real lenses is found in Melles Griot, Chapters 6 and 11, this volume). One goal of the optical system is to generate a light spot in the image plane that is smaller than actually required. This is equivalent to overfilling the ...
Shaped ultrafast laser pulses in the deep ultraviolet
... There is substantial interest in using ultraviolet light for probing molecular chemistry on a femtosecond timescale. Optical pulse shaping (for example see [1, 2, 3]) has been used extensively in applications that require control over broadband laser pulses. By combining pulse shapers and feedback a ...
... There is substantial interest in using ultraviolet light for probing molecular chemistry on a femtosecond timescale. Optical pulse shaping (for example see [1, 2, 3]) has been used extensively in applications that require control over broadband laser pulses. By combining pulse shapers and feedback a ...
Optimized back-focal-plane interferometry directly measures forces
... as “picotensiometers” [3]. The optical trap acts as an elastic spring, since the force is proportional to the displacement of the sample from its equilibrium position (within a small range; only some 100-200 nm in many practical cases [4–6]). Measuring the position of the sample can thus eventually ...
... as “picotensiometers” [3]. The optical trap acts as an elastic spring, since the force is proportional to the displacement of the sample from its equilibrium position (within a small range; only some 100-200 nm in many practical cases [4–6]). Measuring the position of the sample can thus eventually ...
Generation of Polarization Entangled Photon Pairs in a Planar
... bulk crystals [1, 2] and channel waveguides [3–6]. Entangled photon pairs generated through SPDC process in bulk nonlinear optic crystals suffer from a number of problems such as low efficiency, design complication, low interaction length, and are hard to implement for practical applications. In ord ...
... bulk crystals [1, 2] and channel waveguides [3–6]. Entangled photon pairs generated through SPDC process in bulk nonlinear optic crystals suffer from a number of problems such as low efficiency, design complication, low interaction length, and are hard to implement for practical applications. In ord ...
PDF
... Phase profiles are imprinted on the wavefront of a collimated beam from a continuous wave ytterbium-doped fiber laser (IPG Photonics, λ = 1064 nm) using an electronically addressed, reflective SLM (P512-1064, Boulder Nonlinear Systems). The SLM is operated in a phaseonly mode which controls the phas ...
... Phase profiles are imprinted on the wavefront of a collimated beam from a continuous wave ytterbium-doped fiber laser (IPG Photonics, λ = 1064 nm) using an electronically addressed, reflective SLM (P512-1064, Boulder Nonlinear Systems). The SLM is operated in a phaseonly mode which controls the phas ...
Non-linear Optical Microscopy and Spectroscopy for
... on application. The resolution of an image is dependent on the entire setup, from the wavelength of the excitation light, to each individual optical compound in the beam path, such as lenses, mirrors, filters, and the objective. The magnification and resolution are limited by aberrations and diffractio ...
... on application. The resolution of an image is dependent on the entire setup, from the wavelength of the excitation light, to each individual optical compound in the beam path, such as lenses, mirrors, filters, and the objective. The magnification and resolution are limited by aberrations and diffractio ...
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.