Charalambos Klitis
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View article: Shaping the spectral correlation of bi-photon quantum frequency combs by multi-frequency excitation of an SOI integrated nonlinear resonator
Shaping the spectral correlation of bi-photon quantum frequency combs by multi-frequency excitation of an SOI integrated nonlinear resonator Open
We reveal the generation of a broadband (> 1.9 THz) bi-photon quantum frequency comb (QFC) in a silicon-on-insulator (SOI) Fabry–Pérot micro-cavity and the control of its spectral correlation properties. Correlated photon pairs are generat…
View article: On-chip generation of adjustable cylindrical vector beams
On-chip generation of adjustable cylindrical vector beams Open
Cylindrical vector (CV) beams have sparked considerable interest due to their extraordinary vectorial properties, desirable for applications ranging from microscopy to high energy physics. Increasing demand for cost-effective, small-footpr…
View article: Metasurface-enhanced light detection and ranging technology
Metasurface-enhanced light detection and ranging technology Open
View article: Separating arbitrary free-space beams with an integrated photonic processor
Separating arbitrary free-space beams with an integrated photonic processor Open
View article: Multi-Channel Free-Space Optics Receiver Enabled by a Programmable Photonic Processor
Multi-Channel Free-Space Optics Receiver Enabled by a Programmable Photonic Processor Open
A silicon photonic programmable processor of reconfigurable Mach-Zehnder interferometers is used to receive pairs of orthogonal spatially-overlapped beams modulated, sharing the same wavelength and polarization. The processor can automatic…
View article: Amorphous-silicon visible-light detector integrated on silicon nitride waveguides
Amorphous-silicon visible-light detector integrated on silicon nitride waveguides Open
Visible-light integrated photonics is emerging as a promising technology for the realization of optical devices for applications in sensing, quantum information and communications, imaging, and displays. Among the existing photonic platfor…
View article: Metasurface-enhanced Light Detection and Ranging Technology
Metasurface-enhanced Light Detection and Ranging Technology Open
Deploying advanced imaging solutions to robotic and autonomous systems by mimicking human vision requires simultaneous acquisition of multiple fields of views, named the peripheral and fovea regions. Low-resolution peripheral field provide…
View article: Metasurface-enhanced Light Detection and Ranging Technology
Metasurface-enhanced Light Detection and Ranging Technology Open
Deploying advanced imaging solutions to robotic and autonomous systems by mimicking human vision requires simultaneous acquisition of multiple fields of views, named the peripheral and fovea regions. Low-resolution peripheral field provide…
View article: Amorphous-silicon visible-light detector integrated in silicon nitride waveguides
Amorphous-silicon visible-light detector integrated in silicon nitride waveguides Open
Visible light integrated photonics is emerging as a promising technology for the realization of optical devices for applications in sensing, quantum information and communications, imaging and displays. Among the existing photonic platform…
View article: Experimentation Scenarios for Machine Learning-Based Resource Management
Experimentation Scenarios for Machine Learning-Based Resource Management Open
View article: Multibeam Free Space Optics Receiver Enabled by a Programmable Photonic Mesh
Multibeam Free Space Optics Receiver Enabled by a Programmable Photonic Mesh Open
Free-space optics (FSO) is an attractive technology to meet the ever-growing demand for wireless bandwidth in next generation networks. To increase the spectral efficiency of FSO links, transmission over spatial division multiplexing (SDM)…
View article: Self-Configuring Silicon-Photonic Receiver for Multimode Free Space Channels
Self-Configuring Silicon-Photonic Receiver for Multimode Free Space Channels Open
A self-configuring mesh of silicon Mach-Zehnder Interferometers is employed to receive two spatially overlapped orthogonal beams modulated at 10 Gbit/s. These beams, sharing the same wavelength and state of polarization, are separated with…
View article: Compact amorphous-silicon visible-light monitor integrated in silicon nitride waveguides
Compact amorphous-silicon visible-light monitor integrated in silicon nitride waveguides Open
This work reports on the realization of an amorphous silicon visible-light detector integrated in Si3N4 waveguides. The device is very compact (< 40 μm), has a responsivity of about 10 mA/W and a sensitivity of -40 dBm.
View article: Multimode Free Space Optical Link Enabled by SiP Integrated Meshes
Multimode Free Space Optical Link Enabled by SiP Integrated Meshes Open
A silicon photonic mesh of tuneable Mach-Zehnder Interferometers (MZIs) is employed to receive two spatially-overlapped Hermite-Gaussian beams modulated at 10 Gbit/s, sharing the same wavelength and state of polarization. The mesh automati…
View article: High precision integrated photonic thermometry enabled by a transfer printed diamond resonator on GaN waveguide chip
High precision integrated photonic thermometry enabled by a transfer printed diamond resonator on GaN waveguide chip Open
We demonstrate a dual-material integrated photonic thermometer, fabricated by high accuracy micro-transfer printing. A freestanding diamond micro-disk resonator is printed in close proximity to a gallium nitride on a sapphire racetrack res…
View article: Spatially dense integration of micron-scale devices from multiple materials on a single chip via transfer-printing
Spatially dense integration of micron-scale devices from multiple materials on a single chip via transfer-printing Open
The heterogeneous integration of devices from multiple material platforms onto a single chip is demonstrated using a transfer-printing (TP) technique. Serial printing of devices in spatially dense arrangements requires that subsequent proc…
View article: Thermo-optic coefficient of PECVD silicon-rich silicon nitride
Thermo-optic coefficient of PECVD silicon-rich silicon nitride Open
The thermo-optic coefficient (TOC) of photonic integrated waveguides fabricated on silicon-rich silicon nitride grown by plasma-enanched chemical vapor deposition is characterized for the first time, to the best of our knowledge. The TOC i…
View article: Automated Nanoscale Absolute Accuracy Alignment System for Transfer Printing
Automated Nanoscale Absolute Accuracy Alignment System for Transfer Printing Open
The heterogeneous integration of micro- and nanoscale devices with on-chip circuits and waveguide platforms is a key enabling technology, with wide-ranging applications in areas including telecommunications, quantum information processing,…
View article: Large-scale integrated reconfigurable orbital angular momentum mode multiplexer
Large-scale integrated reconfigurable orbital angular momentum mode multiplexer Open
Recent experiments in orbital angular momentum multiplexing have demonstrated its potential for improving the link capacity in optical interconnection networks. Meanwhile, compact photonic integrated orbital angular momentum (de-)multiplex…
View article: Trimming of silicon-on-insulator ring-resonators via localized laser annealing
Trimming of silicon-on-insulator ring-resonators via localized laser annealing Open
We propose a post-fabrication trimming method for the silicon-on-insulator photonic platform based on localised laser annealing of hydrogen silsesquioxane (HSQ) cladding. The technique is fast, does not degrade the device performance, does…
View article: Transfer printing of AlGaAs-on-SOI microdisk resonators for selective mode coupling and low-power nonlinear processes
Transfer printing of AlGaAs-on-SOI microdisk resonators for selective mode coupling and low-power nonlinear processes Open
The transfer printing of aluminum gallium arsenide (AlGaAs) microdisk resonators onto a silicon-on-insulator (SOI) waveguide platform is demonstrated. The integrated resonators exhibit loaded -factors reaching , and the vertical …
View article: All-optical tuning of a diamond micro-disk resonator on silicon
All-optical tuning of a diamond micro-disk resonator on silicon Open
High-quality integrated diamond photonic devices have previously been demonstrated in applications from non-linear photonics to on-chip quantum optics. However, the small sample sizes of single crystal material available, and the difficult…
View article: Active On-Chip Dispersion Control Using a Tunable Silicon Bragg Grating
Active On-Chip Dispersion Control Using a Tunable Silicon Bragg Grating Open
Actively controllable dispersion in on-chip photonic devices is challenging to implement compared with free space optical components where mechanical degrees of freedom can be employed. Here, we present a method by which continuously tunab…
View article: Integrated AlGaAs Devices for Non-linear Applications
Integrated AlGaAs Devices for Non-linear Applications Open
The heterogeneous integration of AlGaAs-on-insulator has great potential for nonlinear optics. This talk will explore chip-scale bonding and transfer printing techniques for the development of integrated photonic chips for second- and thir…
View article: Optimization and uncertainty quantification of gradient index metasurfaces [Invited]
Optimization and uncertainty quantification of gradient index metasurfaces [Invited] Open
The design of intrinsically flat two-dimensional optical components, i.e., metasurfaces, generally requires an extensive parameter search to target the appropriate scattering properties of their constituting building blocks. Such design me…
View article: Orbital angular momentum vector modes (de)multiplexer based on multimode micro-ring
Orbital angular momentum vector modes (de)multiplexer based on multimode micro-ring Open
Orbital angular momentum (OAM) multiplexing has emerged as an important method to increase the communication capacities in future optical information technologies. In this work, we demonstrate a silicon integrated OAM (de)multiplexer with …
View article: The orbital angular momentum of light for ultra-high capacity data centers
The orbital angular momentum of light for ultra-high capacity data centers Open
<p>The potential of orbital angular momentum (OAM) of light in data center scenarios is presented. OAMs can be<br>\nexploited for short reach ultra-high bit rate fiber links and as additional multiplexing domain in transparent …
View article: High accuracy transfer printing of single-mode membrane silicon photonic devices
High accuracy transfer printing of single-mode membrane silicon photonic devices Open
A transfer printing (TP) method is presented for the micro-assembly of integrated photonic devices from suspended membrane components. Ultra thin membranes with thickness of 150nm are directly printed without the use of mechanical support …
View article: OpenFlow-Control of an OAM-Based Two-Layer Switch Supporting 100Gb/s Real Data-Traffic
OpenFlow-Control of an OAM-Based Two-Layer Switch Supporting 100Gb/s Real Data-Traffic Open
<p>A two-layer orbital angular momentum and wavelength based switch is presented and characterized up to 100Gb/s with coherent polarization-multiplexed real data traffic. The switch is successfully reconfigured by applying an OpenFlo…
View article: 4 OAM x 4 WDM Optical Switching Based on an Innovative Integrated Tunable OAM Multiplexer
4 OAM x 4 WDM Optical Switching Based on an Innovative Integrated Tunable OAM Multiplexer Open
A 4OAMx4WDM switching experiment has been carried out combining an innovative integrated tunable OAM multiplexer based on 4-concentric omega-shaped silicon waveguides and a refractive element-based OAM demultiplexer; operation is demonstra…