scholarly journals Coherent control at gold needle tips approaching the strong-field regime

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Philip Dienstbier ◽  
Timo Paschen ◽  
Peter Hommelhoff
Keyword(s):  
Relative Phase ◽  
Coherent Control ◽  
Strong Field ◽  
Second Harmonic ◽  
Laser Pulses ◽  
Energy Spectra ◽  
Fundamental Field ◽  
Plasmonic Material ◽  
Control Scheme ◽  
Strong Field Physics

Abstract We demonstrate coherent control in photoemission from a gold needle tip using an ω − 2ω field composed of strong few-cycle laser pulses with a nearfield intensity of ∼4 TW/cm2. We obtain the nearfield intensity from electron energy spectra, showing the tell-tale plateau of field-driven electron rescattering at the metal surface induced by the fundamental field. Changing the relative phase between the fundamental field centered at 1560 nm and its second harmonic modulates the total emitted photocurrent with visibilities of up to 80% despite the strong and broadband excitation of the plasmonic material. Our work combines a two-color coherent control scheme and strong-field physics enabled by a nanoplasmonic emitter.

scholarly journals Compression of TW class laser pulses in a planar hollow waveguide for applications in strong-field physics

2014 ◽  
Vol 68 (12) ◽  
Author(s):  
Amélie Jarnac ◽  
Fernando Brizuela ◽  
Christoph M. Heyl ◽  
Piotr Rudawski ◽  
Filippo Campi ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Hollow Waveguide ◽  
Strong Field Physics

scholarly journals Efficient Generation of Spectrum-Manipulated Few-Cycle Laser Pulses through Cascaded Dual-Chirped OPA

2021 ◽  
Vol 22 (13) ◽  
pp. 6887
Author(s):  
Zuofei Hong ◽  
Han Zhang ◽  
Shaolin Ke
Keyword(s):  
Conversion Efficiency ◽  
Strong Field ◽  
Nonlinear Crystal ◽  
Ultrafast Optics ◽  
Laser Pulses ◽  
Signal Spectrum ◽  
Phase Matching ◽  
Signal Pulse ◽  
Efficient Generation ◽  
Strong Field Physics

The cascaded dual-chirped optical parametric amplification (DC-OPA) is presented for efficient generation of few-cycle infrared (IR) laser pulses. The input pulses are strategically chirped to optimize the phase-matching bandwidth in each nonlinear crystal, and four regions of the signal spectrum are amplified in cascaded crystals with different cutting angles, enabling flexible manipulation of the output spectrum. Broadband gain and high conversion efficiency are simultaneously achieved owing to the cascaded-crystal arrangement, the signal pulse duration of 4.2 cycles is obtained with 11.7-mJ pulse energy, corresponding to a conversion efficiency of 39.0%. The proposed scheme offers a robust and simple approach to pushing the phase-matching bandwidth limits introduced by the nonlinear crystal, which manifests great prospect in various researches involving ultrafast optics and strong-field physics.

TWO-COLOR COHERENT CONTROL OF OPTICAL BISTABILITY IN ASYMMETRIC SEMICONDUCTOR QUANTUM WELLS

2008 ◽  
Vol 22 (06) ◽  
pp. 393-404 ◽  
Author(s):  
JIA-HUA LI ◽  
XIANG-YING HAO
Keyword(s):  
Quantum Wells ◽  
Optical Switching ◽  
Optical Bistability ◽  
Coherent Control ◽  
Second Harmonic ◽  
Intersubband Transitions ◽  
Fundamental Field ◽  
Harmonic Field ◽  
Semiconductor Quantum Wells ◽  
Semiconductor Quantum Well

We investigate optical bistability in intersubband transitions of an asymmetric semiconductor quantum well structure that has equidistant transitions between three subbands of the system and is placed in a unidirectional cavity. The system is simultaneously coupled by a fundamental field and its second harmonic. The second harmonic field acts as a control field and significantly influences the optical bistability. In addition, the two-color coherent control of optical bistability by the relative phase of the fundamental and the second harmonic fields is shown. The influence of the electronic cooperation parameter on the OB behavior is also discussed. This investigation may be used for optimizing and controlling the optical switching process in the SQW solid-state system, which is much more practical than that in the atomic system because of its flexible design and the controllable interference strength.

scholarly journals Simple interferometric setup enabling sub-Fourier-scale ultra-short laser pulses

2021 ◽  
Author(s):  
Enrique Gustavo Neyra ◽  
Gustavo A. Torchia ◽  
Pablo Vaveliuk ◽  
Fabian Videla
Keyword(s):  
Coherent Control ◽  
Strong Field ◽  
Michelson Interferometer ◽  
Laser Pulses ◽  
Spherical Mirror ◽  
Interferometric Method ◽  
Short Pulses ◽  
Central Wavelength ◽  
Symmetrical Configuration ◽  
Spatial Chirp

Abstract In this work, we describe an interferometric method to generate ultra-short pulses below the Fourier limit. It is done by extending concepts first developed in the spatial domain to achieve sub-diffractive beams through the addition of a spatial chirp in one of the arms of a Michelson interferometer using a spherical mirror. To experimentally synthesize sub-Fourier pulses, we replace the spherical mirror with a water cell, since it produces chirp in the temporal domain. We also present an alternative procedure, based on asymmetrical interference between the widened pulse and the original pulse where the peaks of both pulses exhibit a temporal delay achieving the narrowing of ultra-short pulses with sub-Fourier scales. To characterize the performance of the system, we performed a preliminary assessment considering the percentage of FWHM shrinking obtained for each scheme. By means of a symmetrical configuration 7 and 12 \% pulse reductions were verified, both experimentally and analytically, while for the non-symmetrical configuration 10 and 24\% reductions were achieved corresponding to main lobe to side-lobes ratios of 10 and 30\% . The experimental setup scheme is simple, versatile and able to work with high-power laser sources and ultra-short pulses with a broad bandwidth at any central wavelength. The results presented in this work are promising and help to enlighten new routes and strategies in the design of coherent control systems. We envision that they will become broadly useful in different areas from strong field domain to quantum information.

scholarly journals From strong-field physics in and at nanoscale matter to photonics-based laser accelerators

2019 ◽  
Vol 205 ◽  
pp. 08009
Author(s):  
Martin Kozák ◽  
Takuya Higuchi ◽  
Joshua McNeur ◽  
Roy Shiloh ◽  
Christian Heide ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Free Electrons ◽  
Strong Field Physics ◽  
Laser Acceleration ◽  
Laser Accelerators ◽  
Ultrashort Laser

New ways of controlling quasi-free and free electrons by means of phase-controlled ultrashort laser pulses are demonstrated: from strong-field physics in the conducting 2-d material graphene and at the surface of nanostructures, to laser acceleration of free electrons with a nanophotonic structure, and the demonstration of the longitudinal Kapitza-Dirac effect.

Strong-field physics: general discussion

2021 ◽  
Author(s):  
Kyle Acheson ◽  
Felix Allum ◽  
Rituparna Das ◽  
Gopal Dixit ◽  
Huan Doan ◽  
...  
Keyword(s):  
Strong Field ◽  
Strong Field Physics

2D organic-inorganic hybrid perovskite materials for nonlinear optics

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1787-1810 ◽  
Author(s):  
Xiao Han ◽  
Yongshen Zheng ◽  
Siqian Chai ◽  
Songhua Chen ◽  
Jialiang Xu
Keyword(s):  
Nonlinear Optical ◽  
Second Harmonic ◽  
Low Cost ◽  
Laser Pulses ◽  
Structural Features ◽  
Photon Absorption ◽  
Saturable Absorption ◽  
Research Attention ◽  
Inorganic Hybrid ◽  
Quantum Well Structures

AbstractTwo-dimensional (2D) organic-inorganic hybrid perovskites feature characteristics of inherent quantum-well structures and intriguing optoelectronic properties, and have therefore attracted enormous research attention for their optical applications in light emitting, sensing, modulation, and telecommunication devices. The low-cost and solution-processed fabrications as well as alternative organic spacer cations endue 2D hybrid perovskites with higher tunability in optical and photonic applications. In particular, they demonstrate distinguished nonlinear optical characters such as second-harmonic generation (SHG), two-photon absorption (2PA), and saturable absorption (SA) under the excitation of laser pulses. Here, we discuss the construction of the various sorts of 2D hybrid perovskites with different structural features. We have also highlighted some representative properties and applications of these 2D hybrid perovskites in both linear and nonlinear optical regimes.

scholarly journals Control of strong-field ionization with two-color laser pulses

2015 ◽  
Vol 635 (9) ◽  
pp. 092122
Author(s):  
N Camus ◽  
L Fechner ◽  
D G Arbó ◽  
C Lemell ◽  
S Nagele ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Field Ionization ◽  
Strong Field Ionization
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