Photon Acceleration Using a Time-Varying Epsilon-near-Zero Metasurface

ACS Photonics ◽  
2021 ◽  
Author(s):  
Cong Liu ◽  
M. Zahirul Alam ◽  
Kai Pang ◽  
Karapet Manukyan ◽  
Orad Reshef ◽  
...  
Keyword(s):  
Time Varying ◽  
Photon Acceleration ◽  
Epsilon Near Zero

Efficient epsilon-near-zero metasurface for time-varying applications and time diffraction

2021 ◽  
Author(s):  
Romain Tirole ◽  
Taran Attavar ◽  
Jakub Dranczewski ◽  
Emanuele Galiffi ◽  
John B. Pendry ◽  
...  
Keyword(s):  
Time Varying ◽  
Epsilon Near Zero

Covariant formulation of photon acceleration

1997 ◽  
Vol 58 (4) ◽  
pp. 647-654 ◽  
Author(s):  
J. T. MENDONÇA ◽  
K. HIZANIDIS ◽  
D. J. FRANTZESKAKIS ◽  
L. OLIVEIRA e SILVA ◽  
J. L. VOMVORIDIS
Keyword(s):  
Ray Tracing ◽  
Relativistic Particle ◽  
Rest Mass ◽  
Covariant Theory ◽  
Covariant Formulation ◽  
Time Varying ◽  
Ionization Fronts ◽  
Transition To Chaos ◽  
Photon Acceleration ◽  
Threshold Criteria

We present a covariant theory of photon acceleration in time-varying plasmas. This is a ray-tracing model for frequency upshift of waves interacting with relativistic plasma perturbations, such as ionization fronts and plasma wakefields. This theory explores the formal analogy between a photon in a plasma and a relativistic particle with a finite rest mass. The covariant ray-tracing theory is applied to the case of photon acceleration by a modulated wakefield. Threshold criteria for transition to chaos are derived.

scholarly journals Broad Frequency Shift of Parametric Processes in Epsilon-Near-Zero Time-Varying Media

2020 ◽  
Vol 10 (4) ◽  
pp. 1318 ◽  
Author(s):  
Vincenzo Bruno ◽  
Stefano Vezzoli ◽  
Clayton DeVault ◽  
Enrico Carnemolla ◽  
Marcello Ferrera ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Frequency Conversion ◽  
Laser Pulses ◽  
Time Varying ◽  
Wave Mixing ◽  
Transmitted Radiation ◽  
Short Laser Pulses ◽  
Parametric Processes ◽  
Zero Time ◽  
Epsilon Near Zero

The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift of reflected and transmitted radiation. Recent reports highlight how such a frequency shift is enhanced in spectral regions where the material features a near-zero real part of the permittivity. Here, we investigate the frequency shift for fields generated by four-wave mixing. In our experiment, we observed a frequency shift of more than 60 nm (compared to the pulse width of ∼40 nm) in the phase conjugated radiation generated by a 500 nm aluminium-doped zinc oxide (AZO) film pumped close to the epsilon-near-zero wavelength. Our results indicate applications of time-varying media for nonlinear optics and frequency conversion.

Tunable Doppler Shift using a Time-Varying Epsilon-Near-Zero Thin Film near 1550 nm

2021 ◽  
Author(s):  
Cong Liu ◽  
M. Zahirul Alam ◽  
Kai Pang ◽  
karapet Manukyan ◽  
Joshua Hendrickson ◽  
...  
Keyword(s):  
Thin Film ◽  
Doppler Shift ◽  
Time Varying ◽  
Epsilon Near Zero

Adiabatic Frequency Conversion Using a Time-Varying Epsilon-Near-Zero Metasurface

Nano Letters ◽  
2021 ◽  
Author(s):  
Kai Pang ◽  
M. Zahirul Alam ◽  
Yiyu Zhou ◽  
Cong Liu ◽  
Orad Reshef ◽  
...  
Keyword(s):  
Frequency Conversion ◽  
Time Varying ◽  
Epsilon Near Zero

scholarly journals Negative Refraction in Time-Varying Strongly Coupled Plasmonic-Antenna–Epsilon-Near-Zero Systems

2020 ◽  
Vol 124 (4) ◽  
Author(s):  
V. Bruno ◽  
C. DeVault ◽  
S. Vezzoli ◽  
Z. Kudyshev ◽  
T. Huq ◽  
...  
Keyword(s):  
Negative Refraction ◽  
Time Varying ◽  
Strongly Coupled ◽  
Epsilon Near Zero
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