Note on Group Velocity and Energy Propagation by Bers, Abraham

Get full text

On the number and location of zero-group-velocity modes by Kausel, Eduardo A.

“…The frequency-wavenumber spectra of laminated media often exhibit anomalous modes with descending branches whose group velocity is negative, and these terminate at a minimum point at which the group velocity transitions from negative to positive. …”
Get full text

Negative group velocity characteristics of spoof surface plasmon polaritons by Jun Lei, Weiwen Li, Qian Qiao, Lei Zhang, Jie Lin

“…In this paper, it is proposed that the negative group velocity is just a component of the actual wave group, which has to be accompanied by a positive group velocity (PGV) component. …”
Get full text

BROADBAND METHOD FOR GROUP VELOCITY DISPERSION MEASUREMENTS IN THE MID-INFRARED by D. S. Klimentov, N. A. Tolstik, V. V. Dvoyrin, I. T. Sorokina

Get full text

Foreshadowing elastic instabilities by negative group velocity in soft composites by Slesarenko, Viacheslav, Galich, Pavel I., Li, Jian, Fang, Xuanlai, Rudykh, Stephan

“…We reveal the existence of a state in soft composites, characterized by the omni-directional negative group velocity in the vicinity of elastic instability. …”
Get full text

On negative effective mass and negative group velocity in anharmonic seismic metamaterials by Zivieri Roberto

Subjects: Get full text

Hermiticity-tunable beam reshaping: localization, recurrence and group velocity oscillation by Kaiwen Ji, Zhenjuan Liu, Yanan Dai, Yuanmei Gao, YiShan Wang, Jintao Bai, Guoquan Zhang, Xinyuan Qi

Subjects: “…group velocity…”
Get full text

Investigating group-velocity-tunable propagation-invariant optical wave-packets by Zhaoyang Li, Yanqi Liu, Yuxin Leng, Ruxin Li

“…Abstract The group-velocity of the propagation-invariant optical wave-packet generated by the conical superposition can be controlled by introducing well-designed arbitrarily-axisymmetric pulse-front deformation, which permits realizing superluminal, subluminal, accelerating, decelerating, and even nearly-programmable group-velocities. …”
Get full text

Zero–group-velocity modes in chalcogenide holey photonic-crystal fibers by Oskooi, Ardavan, Joannopoulos, John D., Johnson, Steven G.

“…This type of bandgap (previously identified only at index contrasts unattainable in glasses) opens up a regime for guiding zero—group-velocity modes not possible in holey fibers with the more common finger-like gaps originating from β→∞. …”
Get full text
Get full text
Get full text

Giant all-optical tunable group velocity dispersion in an optical fiber by Zhu, Yunhui, Greenberg, Joel A., Hussein, Nor Ain, Gauthier, Daniel J.

“…We realize a strongly dispersive material with large tunable group velocity dispersion (GVD) in a commercially-available photonic crystal fiber. …”
Get full text

Continuous variable multimode quantum states via symmetric group velocity matching by V Roman-Rodriguez, B Brecht, Srinivasan K, C Silberhorn, N Treps, E Diamanti, V Parigi

“…In this work, we exploit symmetric group velocity matching (SGVM) to engineer the properties of the squeezed modes of the PDC. …”
Get full text

Frequency spectrum and group velocities of acoustic phonons in PbI2 nanofilms by Ivan Petryk, Yuriy Lutsiuk, Valeriy Kramar

Subjects: Get full text

Multifrequency Bessel beams with adjustable group velocity and longitudinal acceleration in free space by P Hildén, E Ilina, M Kaivola, A Shevchenko

Subjects: Get full text

Evidence of zero group velocity at the lowest dispersion branch through local interactions by Mahmoud M. Samak, Osama R. Bilal

“…Zero group velocity (ZGV) modes can be utilized in many applications in both optics and acoustics. …”
Get full text

Experimental verification of the existence in continuous structures of phase and group velocities in opposite directions by Schieck, Hugo Friedrich.

Get full text

Synthesis of time-bin entangled states via tailored group velocity matching by U'ren, AB, Erdmann, R, Walmsley, I

“…We show that tailored group velocity matching in non- linear chi((2)) crystal sequences interspersed with birefringent chi((1)) compensators can be used to generate time-bin entangled states. …”

Mapping femtosecond pulse front distortion and group velocity dispersion in multiphoton microscopy by Tullis, I, Ameer-Beg, S, Barber, P, Rankov, V, Vojnovic, B

“…Group velocity dispersion (GVD) and pulse front distortion of ultrashort pulses are of critical importance in efficient multiphoton excitation microscopy. …”

Mapping femtosecond pulse front distortion and group velocity dispersion in multiphoton microscopy by Tullis, I, Ameer-Beg, S, Barber, P, Rankov, V, Vojnovic, B

“…Group velocity dispersion (GVD) and pulse front distortion of ultrashort pulses are of critical importance in efficient multiphoton excitation microscopy. …”

Control of group velocity dispersion in single mode fiber based on simulated brillouin scattering / by Nor Ain Husein, 1987-, author, Saktioto, supervisor, Jalil Ali, 1959-, supervisor, Zulfadzli Yusoff, supervisor, Fakulti Sains

Ambient noise tomography of the Aegean region of Türkiye from Rayleigh wave group velocity by Emre Mulumulu, Orhan Polat, Francisco J. Chávez-García

“…We have studied Rayleigh wave group velocities beneath the Aegean region of Türkiye using ambient noise tomography. …”
Get full text