John Cooper
University of Colorado Boulder
OpticsPhysicsIonElectronPhotonLine (formation)Excited stateAtomic physicsField (physics)ScatteringMaterials scienceIonizationQuantum electrodynamicsSpectral lineStark effectLaserQuantum mechanicsRadiative transferExcitation
391Publications
61H-index
11.1kCitations
Publications 362
Newest
#1Simon B. JägerH-Index: 8
#2Haonan Liu (NIST: National Institute of Standards and Technology)H-Index: 2
Last. Murray HollandH-Index: 46
view all 5 authors...
We theoretically analyze the collective dynamics of a thermal beam of atomic dipoles that couple to a single mode when traversing an optical cavity. For this setup we derive a semiclassical model and determine the onset of superradiant emission and its stability. We derive analytical expressions for the linewidth of the emitted light and compare them with numerical simulations. In addition, we find and predict two different superradiant phases; a steady-state superradiant phase and a multi-compo...
1 CitationsSource
#1Simon B. Jäger (CU: University of Colorado Boulder)H-Index: 8
#2Haonan Liu (CU: University of Colorado Boulder)H-Index: 2
Last. Murray Holland (CU: University of Colorado Boulder)H-Index: 46
view all 5 authors...
We investigate the different photon emission regimes created by a pre-excited and collimated atomic beam passing through a single mode of an optical cavity. In the regime where the cavity degrees of freedom can be adiabatically eliminated, we find that the atoms undergo superradiant emission when the collective linewidth exceeds the transit-time broadening. We analyze the case where the atomic beam direction is slanted with respect to the cavity axis. For this situation, we find that a phase of ...
4 CitationsSource
#1Simon B. JägerH-Index: 8
#2Haonan LiuH-Index: 2
Last. Murray HollandH-Index: 46
view all 5 authors...
We investigate the different emission regimes of a pre-excited and collimated atomic beam passing through an optical cavity. In the regime where the cavity degrees of freedom can be adiabatically eliminated, we find that the atoms undergo superradiant emission if the collective linewidth exceeds transit-time broadening. We analyze the case where the atomic beam is not precisely perpendicular to the cavity axis and find a phase of continuous light emission similar to steady-state superradiance fo...
#1Haonan LiuH-Index: 2
#2Simon B. JägerH-Index: 8
Last. Murray HollandH-Index: 46
view all 6 authors...
#1Simon B. Jäger (Saarland University)H-Index: 8
#2John Cooper (CU: University of Colorado Boulder)H-Index: 61
Last. Giovanna Morigi (Saarland University)H-Index: 34
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: We theoretically analyze superradiant emission of light from an ultracold gas of bosonic atoms confined in a bad cavity. A metastable dipolar transition of the atoms couples to the cavity field and is incoherently pumped, and the mechanical effects of cavity-atom interactions tend to order the atoms in the periodic cavity potential. By means of a mean-field model we determine the conditions on the cavity parameters and pump rate that lead to the buildup of a stable macroscopic dipole emitting ...
10 CitationsSource
#1Simon B. JägerH-Index: 8
#2John CooperH-Index: 61
Last. Giovanna MorigiH-Index: 34
view all 4 authors...
We theoretically analyse superradiant emission of light from an ultracold gas of bosonic atoms confined in a bad cavity. The atoms dipolar transition which couples to the cavity is metastable and is incoherently pumped, the atomic motion is affected by the mechanical forces of the cavity standing-wave. By means of a mean-field model we determine the conditions on the cavity parameters and pump rate that lead to steady-state superradiant emission. We show that this occurs when the superradiant de...
1 Citations
#1Leibo DingH-Index: 4
#2James J. ButlerH-Index: 21
Last. John CooperH-Index: 61
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A KHz Pulsed Laser Detection System was developed employing the concept of charge integration with an electrometer, in the NASA Goddard Space Flight Center, Code 618 Calibration Lab for the purpose of using the pulsed lasers for radiometric calibration. Comparing with traditional trans-impedance (current-voltage conversion) detection systems, the prototype of this system consists of a UV-Enhanced Si detector head, a computer controlled shutter system and a synchronized electrometer. The prelimin...
Source
#1John Cooper (LLNL: Lawrence Livermore National Laboratory)H-Index: 61
Source
#1Athreya Shankar (CU: University of Colorado Boulder)H-Index: 7
#2John Cooper (CU: University of Colorado Boulder)H-Index: 61
Last. Murray Holland (CU: University of Colorado Boulder)H-Index: 46
view all 5 authors...
Ultranarrow-linewidth atoms coupled to a lossy optical cavity mode synchronize, i.e. develop correlations, and exhibit steady-state superradiance when continuously repumped. This type of system displays rich collective physics and promises metrological applications. These features inspire us to investigate if analogous spin synchronization is possible in a different platform that is one of the most robust and controllable experimental testbeds currently available: ion-trap systems. We design a s...
16 CitationsSource
#1Philip D. AdamsonH-Index: 26
Last. G. J. FeldmanH-Index: 67
view all 50 authors...