Experimental study of the response time of GaAs as a photoemitter

Aleksandrov, A. V.; Avilov, M.; Calabrese, R.; Ciullo, G.; Dikansky, N.S.; Guidi, V.; Lamanna, Giuseppe; Lenisa, P.; Logachov, P. V.; Novokhatsky, A.; Tecchio, L.; Yang, Bojun

doi:10.1103/physreve.51.1449

Cited by 26 publications

(7 citation statements)

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“…Measurements of bulk 6) and thin film GaAs 7) have shown that the temporal response can be explained by a diffusion model, which assumes a random walk of individual electrons, using two experimentally determined constants; the photoabsorption length À1 and the diffusion coefficient D. Measurements when illuminated by a shorter wavelength of $500 nm have shown a faster response time; 8,9) this is because of its shorter photo absorption length.…”

Section: Introductionmentioning

confidence: 99%

Temporal Response Measurements of GaAs-Based Photocathodes

Honda

Matsuba

Jin

et al. 2013

Jpn. J. Appl. Phys.

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It is well known that a negative electron affinity GaAs photocathode shows a moderate temporal response when excited by a laser pulse of wavelength close to its band gap energy. We show here that the temporal response can be estimated using a diffusion model that describes the internal transport of the conduction electrons. Using a transverse deflection cavity system, we measured the temporal profile of the electron bunch generated by a DC photocathode gun illuminated by a ps pulsed laser. A systematic set of measurements of GaAs cathodes with various active layer thicknesses and boundary conditions confirmed that the observed temporal response is well understood by the diffusion model calculation.

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Section: Introductionmentioning

confidence: 99%

Temporal Response Measurements of GaAs-Based Photocathodes

Honda

Matsuba

Jin

et al. 2013

Jpn. J. Appl. Phys.

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“…These neglected terms, along with some second order perturbation terms, are linear in k and cause a shift of the valence band maxima from the T point when appropriately accounted for. [21] The spin orbit interaction terms included in the interaction matrix are of the form 12) <Y|(t)|#J 0 |£tU)) = +(-)iA , (2.13) [2][3][4][5][6][7][8][9][10][11][12][13][14] This interaction requires the eigenfunctions to be states of J and rrij. Kane obtained solutions for the complete interaction, Hk.…”

Section: Spin Orbit Interactionmentioning

confidence: 99%

“…[3] [4] With a thin active layer, the average electron escape time is presumably much shorter than any spin relaxation times associated with the material and the effect of spin depolarization within the semiconductor is thus minimized. Secondly, the cathode may be used either in a CW mode or pulsed, with pulse lengths as short as 40 psec, [5] by appropriate choice of pump laser. The spin polarization is promptly reversible by reversing the helicity of the pump laser.…”

Section: Introductionmentioning

confidence: 99%

A polarized photoluminescence study of strained layer GaAs photocathodes

Mair¹

1996

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“…Measurements of the response time for GaAs photocathodes have been made only with bulk samples [Aleksandrov 1995. Aleksandrov et al, placed an upper limit of 40ps on the response time, whereas Hartmann et al, found it to be about 30ps.…”

Section: Photocathode Response Timementioning

confidence: 99%

Zeroth-order design report for the next linear collider. Volume 2

Raubenheimer¹

1996

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AcknowledgmentsThis design for the Next Linear Collider (NLC) relies heavily on the first h e a r collider-the Stanford Linear Collider (SLC)-and on all the people who proposed, designed, and commissioned this pioneering accelerator. Without their work, none of this would have been possible (or necessary). In addition, the design owes much to the extensive international research effort that is investigating the different technological paths to a future linear collider. Finally, the NLC Design Group is a list of people, authors and non-authors, who have contributed significantly to this design; our apology in advance to anyone whose name may have inadvertantly been omitted.In the process of completing this "Zeroth-Order Design" for the NLC, we have held two internal reviews and, more recently, an international external review. All of these have been very important to the design and we thank all of those who assisted. In particular, we thank the members of the external review panel which consisted of: Gerry Dugan, Helen Edwards, Hans J?rischholz, David Gurd, Tom Himel, Steve Holmes, Norbert Holtkamp, John Ives, Robert Jameson, Katsunobu Oide, Satoshi Ozaki, John Rees, Nobu Toge. A number of useful comments were made, some of which already have been incorporated into the design. Most members of the internal review committees are listed in the contributors list; additional useful suggestions were given by H. DeStaebler, J.T. Seeman PrefaceThis "Zeroth-Order Design Report" (ZDR) for the Next Linear Collider (NLC) is being created at a time of both great opportunity and uncertainty in the future directions that w i l l be taken by the world-wide community of high-energy physics. There is exciting news that the Large Hadron Collider project has been approved for construction at CERN, and the planned involvement by physicists and engineers from countries around the globe will make this the first accelerator to be designed and built by a truly world-wide collaboration. By contrast, the cancellation of the SSC has demonstrated the necessity of international collaboration on such large scientific projects. The community of scientists and engineers at work on the accelerator physics and technologies of high-energy electron-positron colliders has recognized this need, and has made concerted effort to coordinate research activities to optimize our combined understanding and knowledge. This ZDR is one further step in this process.The first electron-positron linear collider, the Stanford Linear Collider (SLC), began operation in 1989 with the dual purpose to explore the particle physics of the Zo boson and to develop the accelerator physics needed for a future TeV-scale linear collider. The SLC program has proven to be quite successful on both counts. Experiences gained and lessons learned from this prototype collider are a firm foundation for the design and implementation of a next generation machine. Developments at laboratories around the world have led to several choices of technologies to efficiently accelerate...

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Experimental study of the response time of GaAs as a photoemitter

Cited by 26 publications

References 10 publications

Temporal Response Measurements of GaAs-Based Photocathodes

Temporal Response Measurements of GaAs-Based Photocathodes

A polarized photoluminescence study of strained layer GaAs photocathodes

Zeroth-order design report for the next linear collider. Volume 2

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