• Corpus ID: 243833157

A comparison of phase change materials in reconfigurable silicon photonic directional couplers

  title={A comparison of phase change materials in reconfigurable silicon photonic directional couplers},
  author={Ting Yu Teo and Milo{\vs} Krbal and Jan Mistr{\'i}k and Jan Přikryl and Li Lu and Robert E. Simpson},
The unique optical properties of phase change materials (PCMs) can be exploited to develop efficient reconfigurable photonic devices. Here, we design, model, and compare the performance of programmable 1 × 2 optical couplers based on: Ge2Sb2Te5, Ge2Sb2Se4Te1, Sb2Se3, and Sb2S3 PCMs. Once programmed, these devices are passive, which can reduce the overall energy consumed compared to thermo-optic or electro-optic reconfigurable devices. Of all the PCMs studied, our ellipsometry refractive index… 

Figures and Tables from this paper


A New Family of Ultralow Loss Reversible Phase‐Change Materials for Photonic Integrated Circuits: Sb2S3 and Sb2Se3
Phase‐change materials (PCMs) are seeing tremendous interest for their use in reconfigurable photonic devices; however, the most common PCMs exhibit a large absorption loss in one or both states.
Broadband transparent optical phase change materials for high-performance nonvolatile photonics
A new class of O-PCMs based on Ge–Sb–Se–Te (GSST) is introduced which breaks the coupling between refractive index and optical loss allowing low-loss performance benefits and low losses in nonvolatile photonic circuits and electrical pixelated switching have been demonstrated.
Non‐Volatile Reconfigurable Integrated Photonics Enabled by Broadband Low‐Loss Phase Change Material
Phase change materials (PCMs) have long been used as a storage medium in rewritable compact disk and later in random access memory. In recent years, integration of PCMs with nanophotonic structures
Wide Bandgap Phase Change Material Tuned Visible Photonics
Light strongly interacts with structures that are of a similar scale to its wavelength, typically nanoscale features for light in the visible spectrum. However, the optical response of these
Low-Loss and Broadband Nonvolatile Phase-Change Directional Coupler Switches
An optical equivalent of the field-programmable gate array (FPGA) is of great interest to large-scale photonic integrated circuits. Previous programmable photonic devices relying on the weak,
Nonvolatile programmable silicon photonics using an ultralow-loss Sb2Se3 phase change material
To demonstrate full control over the flow of light, nanophotonic digital patterning is introduced as a previously unexplored conceptual approach with a footprint orders of magnitude smaller than state-of-the-art interferometer meshes, which enables a wealth of possibilities in high-density reconfiguration of optical functionalities on silicon chip.
A scheme for simulating multi-level phase change photonics materials
Chalcogenide phase change materials (PCMs) have been extensively applied in data storage, and they are now being proposed for high resolution displays, holographic displays, reprogrammable photonics,
Plasmonic monolithic lithium niobate directional coupler switches
Plasmonic electro-optic directional coupler switches consisting of two closely spaced nm-thin gold nanostripes on LN substrates that guide both coupled electromagnetic modes and electrical signals that control their coupling are demonstrated, thereby enabling ultra-compact switching and modulation functionalities.
Time-domain separation of optical properties from structural transitions in resonantly bonded materials.
The connection between optical properties and structure can be broken using a combination of single-shot femtosecond electron diffraction and optical spectroscopy to follow the lattice dynamics and dielectric function in the phase-change material Ge2Sb2Te5 during an irreversible state transformation.
Phase Change Material Photonics
This review will discuss how to design tuneable-MDM photonics devices, their advantages, and their limitations, before concentrating on PCM-tuned Metal-Dielectric-Metal (MDM) structures.