Rare-earth ion doped Al2O3 for active integrated photonics

WAPM Hendriks, L Chang, CI Van Emmerik… - … in Physics: X, 2021 - Taylor & Francis
ABSTRACT Aluminum oxide (Al2O3) is an emerging material in integrated photonics. It
exhibits a very broad transparency window from the UV to the mid-IR, very low propagation …

Femtosecond pulse amplification on a chip

MA Gaafar, M Ludwig, K Wang, T Wildi… - Nature …, 2024 - nature.com
Femtosecond laser pulses enable the synthesis of light across the electromagnetic spectrum
and provide access to ultrafast phenomena in physics, biology, and chemistry. Chip …

High-confinement alumina waveguides with sub-dB/cm propagation losses at 450 nm

E McKay, NG Pruiti, S May, M Sorel - Scientific Reports, 2023 - nature.com
Amorphous alumina is highly transparent across the visible spectrum, making it a promising
candidate for low-loss waveguiding at short wavelengths. However, previous alumina …

Watt-class silicon photonics-based optical high-power amplifier

N Singh, J Lorenzen, K Wang, MA Gaafar… - Nature …, 2025 - nature.com
High-power amplifiers are critical components in optical systems spanning from long-range
optical sensing and optical communication systems to micromachining and medical surgery …

Hybrid integrated near UV lasers using the deep-UV Al2O3 platform

CAA Franken, W Hendriks, LV Winkler… - arXiv preprint arXiv …, 2023 - arxiv.org
Hybrid integrated diode lasers have so far been realized using silicon, polymer, and silicon
nitride (Si3N4) waveguide platforms for extending on-chip tunable light engines from the …

Sub-2W tunable laser based on silicon photonics power amplifier

N Singh, J Lorenzen, M Kilinc, K Wang… - Light: Science & …, 2025 - nature.com
High-power tunable lasers are intensely pursued due to their vast application potential such
as in telecom, ranging, and molecular sensing. Integrated photonics, however, is usually …

High on-chip gain spiral Al2O3:Er3+ waveguide amplifiers

DB Bonneville, CE Osornio-Martinez, M Dijkstra… - Optics express, 2024 - opg.optica.org
We demonstrate reactively sputtered Al_2O_3: Er^ 3+ waveguide amplifiers with an erbium
concentration of 3.9× 10^ 20 ions/cm^ 3, capable of achieving over 30 dB small signal net …

Synthesis and Characterization of Boron Thin Films Using Chemical and Physical Vapor Depositions

B Schurink, WTE van den Beld, RM Tiggelaar… - Coatings, 2022 - mdpi.com
Boron as thin film material is of relevance for use in modern micro-and nano-fabrication
technology. In this research boron thin films are realized by a number of physical and …

Morphological Stability Limits of Ag–Cu–Al Nanocrystalline Thin Films Prepared via Reactive Sputtering in Ar–O2 Mixed Gas

Y Ueshima, M Hasegawa, N Kubota… - … Materials Transactions A, 2024 - Springer
As a first step toward developing a downsized and high-performance O 2 separator suitable
for large-scale industrial applications, such as steelmaking, we have studied nanocrystalline …

Low-loss and low-temperature Al2O3 thin films for integrated photonics and optical coatings

P Torab Ahmadi, M Chesaux, J Wojcik… - Journal of Vacuum …, 2024 - pubs.aip.org
Amorphous aluminum oxide (Al 2 O 3) is a key material in optical coatings due to its notable
properties, including a broad transparency window (ultraviolet to mid-infrared) and excellent …