Special Issue "Femtosecond Laser Micromachining for Photonics Applications"

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: 30 November 2019.

Special Issue Editors

Dr. Andrea Crespi
E-Mail Website
Guest Editor
Dipartimento di Fisica - Politecnico di Milano, and Istituto di Fotonica e Nanotecnologie - Consiglio Nazionale delle Ricerche (IFN-CNR), Piazza Leonardo da Vinci, 32-20133 Milano, Italy
Interests: femtosecond laser micromachining; waveguide optics; integrated quantum photonics; optofluidics
Dr. Giacomo Corrielli
E-Mail Website
Guest Editor
Istituto di Fotonica e Nanotecnologie - Consiglio Nazionale delle Ricerche (IFN-CNR) and Dipartimento di Fisica-Politecnico di Milano, Piazza Leonardo da Vinci, 32-20133 Milano, Italy
Interests: waveguide optics; femtosecond laser waveguide writing; integrated quantum photonics; quantum communications

Special Issue Information

Dear Colleagues,

Femtosecond lasers are a formidable micromachining tool, applicable to a variety of materials. In particular, femtosecond laser processing has shown unique capabilities in altering the optical properties of the bulk of transparent dielectric substrates in a permanent fashion and with a micrometric resolution, thus allowing the manufacture of innovative integrated devices for photonics applications.

One important application of this technique is the direct and rapid inscription of integrated waveguide circuits with three-dimensional layouts. In the last decade, such circuits have found impressive applications in diverse fields, which include optical sensing, telecommunications, astrophotonics, and quantum photonics. Femtosecond laser pulses have also been exploited to locally engineer the birefringence of the substrate and to produce microstructured birefringent plates. Femtosecond laser nanostructuring at the diffraction limit further allows the inscription of gratings and photonic crystals, as well as dense optical storage of information.

The community researching in the field is growing at a steady pace: Optical devices produced by this technology are amazingly increasing in complexity, and novel ideas are continually being presented. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles on technological advances and novel applicative concepts of femtosecond laser micromachining, with a focus on optics and photonics.

Dr. Andrea Crespi
Dr. Giacomo Corrielli
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • femtosecond laser micromachining
  • femtosecond laser waveguide writing
  • optical material processing
  • integrated photonics
  • birefringence engineering
  • optical storage

Published Papers (2 papers)

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Research

Open AccessArticle
High-Precision Propagation-Loss Measurement of Single-Mode Optical Waveguides on Lithium Niobate on Insulator
Micromachines 2019, 10(9), 612; https://doi.org/10.3390/mi10090612 - 15 Sep 2019
Abstract
We demonstrate the fabrication of single-mode optical waveguides on lithium niobate on an insulator (LNOI) by optical patterning combined with chemomechanical polishing. The fabricated LNOI waveguides had a nearly symmetric mode profile of ~2.5 µm mode field size (full-width at half-maximum). We developed [...] Read more.
We demonstrate the fabrication of single-mode optical waveguides on lithium niobate on an insulator (LNOI) by optical patterning combined with chemomechanical polishing. The fabricated LNOI waveguides had a nearly symmetric mode profile of ~2.5 µm mode field size (full-width at half-maximum). We developed a high-precision measurement approach by which single-mode waveguides were characterized to have propagation loss of ~0.042 dB/cm. Full article
(This article belongs to the Special Issue Femtosecond Laser Micromachining for Photonics Applications)
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Open AccessArticle
A Monolithic Gimbal Micro-Mirror Fabricated and Remotely Tuned with a Femtosecond Laser
Micromachines 2019, 10(9), 611; https://doi.org/10.3390/mi10090611 - 14 Sep 2019
Abstract
With the advent of ultrafast lasers, new manufacturing techniques have come into existence. In micromachining, the use of femtosecond lasers not only offers the possibility for three-dimensional monolithic fabrication inside a single optically transparent material, but also a means for remotely, and arbitrarily, [...] Read more.
With the advent of ultrafast lasers, new manufacturing techniques have come into existence. In micromachining, the use of femtosecond lasers not only offers the possibility for three-dimensional monolithic fabrication inside a single optically transparent material, but also a means for remotely, and arbitrarily, deforming substrates with nanometer resolution. Exploiting this principle and combining it with flexure design, we demonstrate a monolithic micro-mirror entirely made with a femtosecond laser and whose orientation is tuned in a non-contact manner by exposing some part of the device to low energy femtosecond pulses. Given the non-contact nature of the process, the alignment can be very precisely controlled with a resolution that is many orders of magnitude better than conventional techniques based on mechanical positioners. Full article
(This article belongs to the Special Issue Femtosecond Laser Micromachining for Photonics Applications)
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