Laser Sources for Confocal Microscopy
... it absorbs pump energy and goes to an excited level [Fig. 5.2(A)]. It then returns to the ground state via non-radiative relaxation processes and also by emission of radiation [Fig. 5.2(B)]. Under normal conditions, a Boltzmann equilibrium describes the population of the various energy levels: the h ...
... it absorbs pump energy and goes to an excited level [Fig. 5.2(A)]. It then returns to the ground state via non-radiative relaxation processes and also by emission of radiation [Fig. 5.2(B)]. Under normal conditions, a Boltzmann equilibrium describes the population of the various energy levels: the h ...
LIGO Magazine, issue 3, 9/2013 - LIGO Scientific Collaboration
... their success. From left to right: David McClelland, ...
... their success. From left to right: David McClelland, ...
80, 032307 (2009)
... choose the infrared cutoff frequency to be ir ⬃ 0.016 s−1. We note that the decoherence time depends strongly on the characteristics of the power spectrum. For the power spectrum given in Ref. 关51兴, we obtain T2 ⬃ 20 ms for the same trap configuration. Dephasing in a single atomic qubit may be reve ...
... choose the infrared cutoff frequency to be ir ⬃ 0.016 s−1. We note that the decoherence time depends strongly on the characteristics of the power spectrum. For the power spectrum given in Ref. 关51兴, we obtain T2 ⬃ 20 ms for the same trap configuration. Dephasing in a single atomic qubit may be reve ...
Optical frequency combs: From frequency metrology to - JILA-PFC
... metrology [19]. Eventually, next-generation optical clocks are expected to be superior to existing microwave standards and may become future national standards of time and frequency. However, the use of optical frequency standards for the realization of basic units, e.g., of time and length, was ham ...
... metrology [19]. Eventually, next-generation optical clocks are expected to be superior to existing microwave standards and may become future national standards of time and frequency. However, the use of optical frequency standards for the realization of basic units, e.g., of time and length, was ham ...
ULTRAFAST - Trapped Ion Quantum Information
... Trapped atomic ions are a promising medium for quantum computing, due to their long coherence times and potential for scalability. Current methods of entangling ions rely on addressing individual modes of motion within the trap and applying qubit state dependent forces with external fields. This app ...
... Trapped atomic ions are a promising medium for quantum computing, due to their long coherence times and potential for scalability. Current methods of entangling ions rely on addressing individual modes of motion within the trap and applying qubit state dependent forces with external fields. This app ...
Ultrafast Spectroscopy of Atomic and Molecular Quantum Dynamics Pia Johansson
... have kept pace with the technical development of ultrashort pulsed laser sources. One of the pioneers in this area, Ahmed Zewail, published with his collaborators one of the first experimental results obtained by an ultrafast spectroscopic method [3, 4]. They used the time delayed pump-probe spectro ...
... have kept pace with the technical development of ultrashort pulsed laser sources. One of the pioneers in this area, Ahmed Zewail, published with his collaborators one of the first experimental results obtained by an ultrafast spectroscopic method [3, 4]. They used the time delayed pump-probe spectro ...
Design of an efficient terahertz source using triply Please share
... frequency range [2–7]. Traditionally, THz radiation [8] has been generated in one of two ways: with a photoconductive antenna [9], or optical rectification (OR) of amplified femtosecond pulses in ZnTe crystals [10]. These techniques have the inherent disadvantage of requiring an ultrafast laser syst ...
... frequency range [2–7]. Traditionally, THz radiation [8] has been generated in one of two ways: with a photoconductive antenna [9], or optical rectification (OR) of amplified femtosecond pulses in ZnTe crystals [10]. These techniques have the inherent disadvantage of requiring an ultrafast laser syst ...
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s).The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. The laser is then said to be 'phase-locked' or 'mode-locked'. Interference between these modes causes the laser light to be produced as a train of pulses. Depending on the properties of the laser, these pulses may be of extremely brief duration, as short as a few femtoseconds.