Surface-Plasmon Resonance-Enhanced Multiphoton Emission of High-Brightness Electron Beams from a Nanostructured Copper Cathode
Renkai Li,H. To,Gerard Andonian,Jun Feng,A. Polyakov,C. M. Scoby,Kevin S. Thompson,Weishi Wan,Howard A. Padmore,Pietro Musumeci +9 more
TLDR
In this article, a nanohole array-based copper surface was designed to exhibit a plasmonic response at 800 nm, fabricated using the focused ion beam milling technique, optically characterized and tested as a photocathode in a high power radio frequency photoinjector.Abstract:
We experimentally investigate surface-plasmon assisted photoemission to enhance the efficiency of metallic photocathodes for high-brightness electron sources. A nanohole array-based copper surface was designed to exhibit a plasmonic response at 800 nm, fabricated using the focused ion beam milling technique, optically characterized and tested as a photocathode in a high power radio frequency photoinjector. Because of the larger absorption and localization of the optical field intensity, the charge yield observed under ultrashort laser pulse illumination is increased by more than 100 times compared to a flat surface. We also present the first beam characterization results (intrinsic emittance and bunch length) from a nanostructured photocathode.read more
Citations
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Laser-Based Acceleration of Nonrelativistic Electrons at a Dielectric Structure
John Breuer,Peter Hommelhoff +1 more
TL;DR: A proof-of-principle experiment demonstrating dielectric laser acceleration of nonrelativistic electrons in the vicinity of a fused-silica grating and the demonstration of the inverse Smith-Purcell effect in the optical regime.
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Measurement of nanoplasmonic field enhancement with ultrafast photoemission
Zsuzsanna Pápa,Péter Rácz,István Márton,Judit Budai,Piotr Wróbel,Tomasz Stefaniuk,Christine Prietl,Joachim R. Krenn,Péter Dombi +8 more
TL;DR: A method for nanoplasmonic near-field measurement with the help of photoemitted electrons induced by femtosecond laser pulses is demonstrated.
Journal ArticleDOI
High-yield, ultrafast, surface plasmon-enhanced, Au nanorod optical field electron emitter arrays.
Richard G. Hobbs,Yujia Yang,Arya Fallahi,P. D. Keathley,Eva De Leo,Franz X. Kärtner,William Graves,Karl K. Berggren +7 more
TL;DR: The peak optical field at which the electron emission mechanism transitions from a 3-photon absorption mechanism to strong-field tunneling emission is identified, and the effects of nanorod array density on Nanorod charge yield, including measurement of space-charge effects are investigated.
Journal ArticleDOI
Antibiotic residues in broiler and layer meat in Chittagong district of Bangladesh
Sarmina Sattar,Mohammad Mahmudul Hassan,S. Islam,Mahabub Alam,M. S. A. Faruk,Suchayan Chowdhury,A. K. M. Saifuddin +6 more
TL;DR: Evidence suggests that more judicious use of antimicrobials in food animals will reduce the selection of resistant bacteria and help to preserve these valuable drugs for both human and veterinary medicine.
Journal ArticleDOI
Design of a high-flux instrument for ultrafast electron diffraction and microscopy
Daniele Filippetto,Houjun Qian +1 more
TL;DR: In this article, the authors presented a new instrument for ultrafast electron diffraction and imaging, which merges the high peak current and relativistic electron energies of radio-frequency guns, with the high average electron flux of static electron microscopes, extending the beam parameter space achievable with relativists by many orders of magnitude.
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