scholarly journals Measurement of full polarization states with hybrid holography based on geometric phase

2019 ◽  
Vol 27 (6) ◽  
pp. 7968 ◽  
Author(s):  
Jiazhen Dou ◽  
Teli Xi ◽  
Chaojie Ma ◽  
Jianglei Di ◽  
Jianlin Zhao
Keyword(s):  
Geometric Phase ◽  
Polarization States

scholarly journals Geometric Phase in Phasing of Antenna Arrays

2002 ◽  
Vol 199 ◽  
pp. 514-515
Author(s):  
Rajendra Bhandari
Keyword(s):  
Parameter Space ◽  
Antenna Arrays ◽  
Geometric Phase ◽  
Singular Points ◽  
Polarization States

The response of a pair of differently polarized antennas is determined by their polarization states and a phase between them which has a geometric part which becomes discontinuous at singular points in the parameter space. Some consequences are described.

Geometric phase for single-photon mixed polarization states

2004 ◽  
Author(s):  
Julio T. Barreiro ◽  
Marie Ericsson ◽  
Nicholas Peters ◽  
Daryl Achilles ◽  
David Branning ◽  
...  
Keyword(s):  
Geometric Phase ◽  
Single Photon ◽  
Polarization States

scholarly journals Holographic Silicon Metasurfaces for Total Angular Momentum Demultiplexing Applications in Telecom

2019 ◽  
Vol 9 (11) ◽  
pp. 2387 ◽  
Author(s):  
Gianluca Ruffato ◽  
Michele Massari ◽  
Pietro Capaldo ◽  
Filippo Romanato
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Silicon Substrate ◽  
Geometric Phase ◽  
Inductively Coupled Plasma ◽  
Optical Element ◽  
Orthogonal Polarization ◽  
Optical Elements ◽  
Wide Range ◽  
Polarization States

The simultaneous processing of orbital angular momentum (OAM) and polarization has recently acquired particular importance and interest in a wide range of fields ranging from telecommunications to high-dimensional quantum cryptography. Due to their inherently polarization-sensitive optical behavior, Pancharatnam–Berry optical elements (PBOEs), acting on the geometric phase, have proven to be useful for the manipulation of complex light beams with orthogonal polarization states using a single optical element. In this work, different PBOEs have been computed, realized, and optically analyzed for the sorting of beams with orthogonal OAM and polarization states at the telecom wavelength of 1310 nm. The geometric-phase control is obtained by inducing a spatially-dependent form birefringence on a silicon substrate, patterned with properly-oriented subwavelength gratings. The digital grating structure is generated with high-resolution electron beam lithography on a resist mask and transferred to the silicon substrate using inductively coupled plasma-reactive ion etching. The optical characterization of the fabricated samples confirms the expected capability to detect circularly-polarized optical vortices with different handedness and orbital angular momentum.

Local Lattice Strain Measurement Using Geometric Phase Analysis of Dark Field Images from Scanning Transmission Electron Microscopy

2011 ◽  
Author(s):  
Jayhoon Chung ◽  
Guoda Lian ◽  
Lew Rabenberg
Keyword(s):  
Phase Analysis ◽  
Geometric Phase ◽  
Process Development ◽  
Local Strain ◽  
Strain Engineering ◽  
Dark Field ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Geometric Phase Analysis ◽  
Scanning Transmission

Abstract Since strain engineering plays a key role in semiconductor technology development, a reliable and reproducible technique to measure local strain in devices is necessary for process development and failure analysis. In this paper, geometric phase analysis of high angle annular dark field - scanning transmission electron microscope images is presented as an effective technique to measure local strains in the current node of Si based transistors.

Ultraviolet wavefront manipulation using topological insulator metasurfaces based on geometric phase

2021 ◽  
Vol 487 ◽  
pp. 126812
Author(s):  
Mingli Wan ◽  
Pengfei Ji ◽  
Rongrong Wang ◽  
Xiaopeng Zhang ◽  
Mingli Tian ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Geometric Phase

GEOMETRIC PHASE AND DISENTANGLEMENT OF A MOVING FOUR-LEVEL ATOM IN THE PRESENCE OF NONLINEAR MEDIUM

2012 ◽  
Vol 10 (01) ◽  
pp. 1250007 ◽  
Author(s):  
NOUR ZIDAN ◽  
S. ABDEL-KHALEK ◽  
M. ABDEL-ATY
Keyword(s):  
System Dynamics ◽  
Geometric Phase ◽  
Nonlinear Medium ◽  
Atomic Motion ◽  
Kerr Medium ◽  
Mode Structure ◽  
Field Mode ◽  
Level Atom

In this paper, we investigate the geometric phase of the field interacting with a moving four-level atom in the presence of Kerr medium. The results show that the atomic motion, the field-mode structure and Kerr medium play important roles in the evolution of the system dynamics. As illustration, we examine the behavior of the geometric phase and entanglement with experimentally accessible parameters. Some new aspects are observed and discussed.

Enhancement of Transmission Efficiency on Pancharatnam−Berry Geometric Phase Encoding Metasurfaces

2021 ◽  
Vol 533 (2) ◽  
pp. 2000494
Author(s):  
Xiaoyan Tang ◽  
Chenxia Li ◽  
Haiyong Gan ◽  
Yingwei He ◽  
Xufeng Jing ◽  
...  
Keyword(s):  
Geometric Phase ◽  
Transmission Efficiency ◽  
Phase Encoding
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