H
Hiroki Mashiko
Researcher at Nippon Telegraph and Telephone
Publications - 76
Citations - 2076
Hiroki Mashiko is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Attosecond & Laser. The author has an hindex of 22, co-authored 76 publications receiving 1915 citations. Previous affiliations of Hiroki Mashiko include Lawrence Berkeley National Laboratory & Kansas State University.
Papers
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Journal ArticleDOI
Double optical gating of high-order harmonic generation with carrier-envelope phase stabilized lasers.
Hiroki Mashiko,Steve Gilbertson,Chengquan Li,Sabih D. Khan,Mahendra Man Shakya,Eric Moon,Zenghu Chang +6 more
TL;DR: A novel optical switch to control the high-order harmonic generation process so that single attosecond pulses can be generated with multiple-cycle pulses and a unique dependence of the harmonic spectra on the carrier-envelope phase of the laser fields is discovered.
Journal ArticleDOI
Generation of Isolated Attosecond Pulses with 20 to 28 Femtosecond Lasers
Ximao Feng,Steve Gilbertson,Hiroki Mashiko,He Wang,Sabih D. Khan,Michael Chini,Yi Wu,Kun Zhao,Zenghu Chang +8 more
TL;DR: This work proposes and demonstrates a technique called generalized double optical gating for generating isolated attosecond pulses with 20 fs lasers from a hollow-core fiber and 28 fs lasers directly from an amplifier, which makes attophysics more accessible to many laboratories that are capable of producing such multicycle laser pulses.
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Ion-energy dependence of asymmetric dissociation of D2 by a two-color laser field.
Dipanwita Ray,Feng He,Sankar De,Wei Cao,Hiroki Mashiko,Predrag Ranitovic,Kamal P. Singh,Irina Znakovskaya,Uwe Thumm,Gerhard G. Paulus,Matthias F. Kling,Igor Litvinyuk,Igor Litvinyuk,C. L. Cocke +13 more
TL;DR: Two-color short linearly polarized pulses are used to ionize and dissociate D2 into a neutral deuterium atom and a deuteron, and strong yield asymmetries are found in the ion-energy regions traditionally identified as bond softening, above-threshold dissociation and rescattering.
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Petahertz optical drive with wide-bandgap semiconductor
TL;DR: In this paper, the authors demonstrate optical driving at a petahertz frequency in the wide-bandgap semiconductor gallium nitride, which corresponds to instantaneous light-induced switching from insulator to conductor.
Journal ArticleDOI
Light-induced states in attosecond transient absorption spectra of laser-dressed helium
Shaohao Chen,M. Justine Bell,M. Justine Bell,Annelise R. Beck,Annelise R. Beck,Hiroki Mashiko,Mengxi Wu,Andreas Pfeiffer,Andreas Pfeiffer,Mette B. Gaarde,Daniel M. Neumark,Daniel M. Neumark,Stephen R. Leone,Stephen R. Leone,Kenneth J. Schafer +14 more
TL;DR: In this paper, transient absorption spectroscopy using isolated 400-as pulses centered at 22 eV and 12-fs near-infrared (NIR) pulses with 780-nm central wavelength is studied.