Density controlled nanophotonic waveguide gratings for efficient on-chip out-coupling in the near field (Conference Presentation)

2016 ◽  
Author(s):  
Dries Vercruysse ◽  
Vignesh Mukund ◽  
Roelof A. Jansen ◽  
Richard Stahl ◽  
Pol Van Dorpe ◽  
...  
Keyword(s):  
Near Field ◽  
Waveguide Gratings ◽  
On Chip

scholarly journals Demonstration of an integrated nanophotonic chip-scale alkali vapor magnetometer using inverse design

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yoel Sebbag ◽  
Eliran Talker ◽  
Alex Naiman ◽  
Yefim Barash ◽  
Uriel Levy
Keyword(s):  
Spatial Resolution ◽  
Near Field ◽  
Computer Assisted ◽  
Experimental Characterization ◽  
Optical Isolation ◽  
New Concepts ◽  
On Chip ◽  
The Cost ◽  
Micrometer Scale

AbstractRecently, there has been growing interest in the miniaturization and integration of atomic-based quantum technologies. In addition to the obvious advantages brought by such integration in facilitating mass production, reducing the footprint, and reducing the cost, the flexibility offered by on-chip integration enables the development of new concepts and capabilities. In particular, recent advanced techniques based on computer-assisted optimization algorithms enable the development of newly engineered photonic structures with unconventional functionalities. Taking this concept further, we hereby demonstrate the design, fabrication, and experimental characterization of an integrated nanophotonic-atomic chip magnetometer based on alkali vapor with a micrometer-scale spatial resolution and a magnetic sensitivity of 700 pT/√Hz. The presented platform paves the way for future applications using integrated photonic–atomic chips, including high-spatial-resolution magnetometry, near-field vectorial imaging, magnetically induced switching, and optical isolation.

scholarly journals Direct quantification of topological protection in symmetry-protected photonic edge states at telecom wavelengths

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Sonakshi Arora ◽  
Thomas Bauer ◽  
René Barczyk ◽  
Ewold Verhagen ◽  
L. Kuipers
Keyword(s):  
Near Field ◽  
Edge States ◽  
Quantum Networks ◽  
Hall Effects ◽  
Upper Limits ◽  
On Chip ◽  
Symmetry Protected ◽  
Topological Robustness ◽  
Direct Quantification ◽  
Sub Wavelength

AbstractTopological on-chip photonics based on tailored photonic crystals (PhCs) that emulate quantum valley-Hall effects has recently gained widespread interest owing to its promise of robust unidirectional transport of classical and quantum information. We present a direct quantitative evaluation of topological photonic edge eigenstates and their transport properties in the telecom wavelength range using phase-resolved near-field optical microscopy. Experimentally visualizing the detailed sub-wavelength structure of these modes propagating along the interface between two topologically non-trivial mirror-symmetric lattices allows us to map their dispersion relation and differentiate between the contributions of several higher-order Bloch harmonics. Selective probing of forward- and backward-propagating modes as defined by their phase velocities enables direct quantification of topological robustness. Studying near-field propagation in controlled defects allows us to extract upper limits of topological protection in on-chip photonic systems in comparison with conventional PhC waveguides. We find that protected edge states are two orders of magnitude more robust than modes of conventional PhC waveguides. This direct experimental quantification of topological robustness comprises a crucial step toward the application of topologically protected guiding in integrated photonics, allowing for unprecedented error-free photonic quantum networks.

On-Chip Terahertz Near-Field Generation/Detection Scheme

2018 ◽  
Author(s):  
Dmitry S. Bulgarevich ◽  
Yusuke Akamine ◽  
Hideaki Kitahara ◽  
Valynn Katrine P. Mag-Usara ◽  
Hiroyuki Kato ◽  
...  
Keyword(s):  
Near Field ◽  
Detection Scheme ◽  
Field Generation ◽  
On Chip

Atomic force microscopy imaging using a tip-on-chip: Opening the door to integrated near field nanotools

2010 ◽  
Vol 81 (9) ◽  
pp. 093707 ◽  
Author(s):  
J. Hayton ◽  
J. Polesel-Maris ◽  
R. Demadrille ◽  
M. Brun ◽  
F. Thoyer ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Near Field ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
Atomic Force Microscopy Imaging ◽  
On Chip

Control of duty ratio in waveguide gratings using a near-field holographic lithography system with a variable aperture

2008 ◽  
Vol 85 (5-6) ◽  
pp. 925-928 ◽  
Author(s):  
Jun-Ho Sung ◽  
Jeong-Su Yang ◽  
Bo-Soon Kim ◽  
Chul-Hyun Choi ◽  
Min-Woo Lee ◽  
...  
Keyword(s):  
Near Field ◽  
Duty Ratio ◽  
Holographic Lithography ◽  
Variable Aperture ◽  
Waveguide Gratings ◽  
Lithography System

scholarly journals Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics

2020 ◽  
Author(s):  
Georgy Ermolaev ◽  
D. Grudinin ◽  
Y. Stebunov ◽  
K. Voronin ◽  
Vasyl Kravets ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Anisotropy ◽  
Near Infrared ◽  
Near Field ◽  
Transition Metal Dichalcogenides ◽  
Next Generation ◽  
Infrared Wavelength ◽  
Infrared Spectral ◽  
Metal Dichalcogenides ◽  
On Chip

Abstract Large optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy was recently observed in the mid-infrared wavelength range, for visible and near-infrared spectral intervals, the problem remains acute with the highest reported birefringence values of 0.8 in BaTiS3 and h-BN crystals. This inspired an intensive search for giant optical anisotropy among natural and artificial materials. Here, we demonstrate that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Walls interaction. To do this, we carried out a correlative far- and near-field characterization validated by first-principle calculations that reveals an unprecedented birefringence of 1.5 in the infrared and 3 in the visible light for MoS2. Our findings demonstrate that this outstanding anisotropy allows for tackling the diffraction limit enabling an avenue for on-chip next-generation photonics.

scholarly journals On-chip Spectrometer Formed by a Multi-stage Structure

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Li Jin ◽  
Shaoyu Zhao ◽  
Zhipeng Hu ◽  
Xiaoyan Hu
Keyword(s):  
Network Performance ◽  
Performance Monitoring ◽  
Stage Structure ◽  
Optical Signal ◽  
Apparent Size ◽  
Good Choice ◽  
Arrayed Waveguide Gratings ◽  
Waveguide Gratings ◽  
On Chip ◽  
Arrayed Waveguide

With apparent size and weight advantages, on-chip spectrometer could be a good choice for the spectrum analysis application which has been widely used in numerous areas such as optical network performance monitoring, materials analysis and medical research. In order to realize the broadband and the high resolution simultaneously, we propose a new on-chip spectrometer structure, which is a two-stage structure. The coarse wavelength division is realized by the cascaded Mach-Zehnder interferometers, which is the first stage of the spectrometer. The output of the Mach-Zehnder interferometers are further dispersed by the second stage structure, which can be realized either by arrayed waveguide gratings or by digital Fourier transform spectrometer structure. We further implemented the thermo-optic modulation for the arrayed waveguide gratings to achieve a higher spectral resolution. The output channel wavelengths of the spectrometer are modulated by the embedded heater to obtain the first order derivative spectra of the input optical signal to obtain a 2nm resolution. With respect to the computer simulation and device characterization results, the 400nm spectral range and the nanoscale resolution have been demonstrated.

Sign in / Sign up

Export Citation Format

Share Document