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Optics
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Laser-Assisted Micro- and Nano-Fabrications
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Laser-Assisted Micro- and Nano-Fabrications

A special issue of Optics (ISSN 2673-3269). This special issue belongs to the section "Laser Sciences and Technology".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 3042

Special Issue Editor

Dr. David A. Willis

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Bobby B. Lyle School of Engineering, Southern Methodist University, P.O. Box 750337, Dallas, TX 75275-0337, USA
Interests: laser-assisted microfabrication and micromachining; superhydrophobic surfaces; microfluidics; heat transfer and phase change; microscale heat transfer and fluid flow; biomedical engineering

Special Issue Information

Dear Colleagues,

It has been 60 years since lasers were invented by Dr. Maiman in 1960. In this time, lasers and laser technology have advances considerably in many fields., especially in manufacturing and fabricating technologies.

Lasers provide good light and energy sources for a wide range applications. Microdevices and information technologies have been improved by decreasing their manufacturing size, a lower energy cost, and increasing their integration and operating speed. A broad range of micro/nano fabrication technologies have been developed for different applications. Laser-based micro/nano-manufacturing technologies have emerged in recent years to address relevant issues to increase laser applicability to virtually all kinds of materials at scales down to nanometers. The aim of this Special Issue is to provide an overview of the latest laser techniques developed during these 60 years, categorized into four main areas:

  1. Near field laser fabrications
  2. Far field laser interference lithography and laser direct writing for micro and nano fabrication
  3. Laser manufacturing of nano materials
  4. Stimulated-emission-induced depletion (STED)-assisted laser fabrication.

Let us celebrate the 60th year for lasers!

Dr. David A. Willis
Guest Editor

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 submissions that pass pre-check are 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. Optics is an international peer-reviewed open access quarterly 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 1200 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.

Published Papers (2 papers)

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Research

13 pages, 18048 KiB  
Article
Investigating Laser-Induced Periodic Surface Structures (LIPSS) Formation in Silicon and Their Impact on Surface-Enhanced Raman Spectroscopy (SERS)
by Hardik Vaghasiya and Paul-Tiberiu Miclea
Optics 2023, 4(4), 538-550; https://doi.org/10.3390/opt4040039 - 19 Oct 2023
Viewed by 1327
Abstract
Laser-induced periodic surface structures (LIPSS) have gained significant attention due to their ability to modify the surface morphology of materials at the micro-nanoscale and show great promise for surface functionalization applications. In this study, we specifically investigate the formation of LIPSS in silicon [...] Read more.
Laser-induced periodic surface structures (LIPSS) have gained significant attention due to their ability to modify the surface morphology of materials at the micro-nanoscale and show great promise for surface functionalization applications. In this study, we specifically investigate the formation of LIPSS in silicon substrates and explore their impact on surface-enhanced Raman spectroscopy (SERS) applications. This study reveals a stepwise progression of LIPSS formation in silicon, involving three distinct stages of LIPSS: (1) integrated low-spatial-frequency LIPSS (LSFL) and high-spatial-frequency LIPSS (HSFL), (2) principally LSFL and, (3) LSFL at the edge of the irradiated spot, elucidating the complex interplay between laser fluence, pulse number, and resulting surface morphology. Furthermore, from an application standpoint, these high-quality multi-scale periodic patterns lead to the next step of texturing the entire silicon surface with homogeneous LIPSS for SERS application. The potential of LIPSS-fabricated silicon substrates for enhancing SERS performance is investigated using thiophenol as a test molecule. The results indicate that the Au-coated combination of LSFL and HSFL substrates showcased the highest enhancement factor (EF) of 1.38×106. This pronounced enhancement is attributed to the synergistic effects of localized surface plasmon resonance (LSPR) and surface plasmon polaritons (SPPs), intricately linked to HSFL and LSFL characteristics. These findings contribute to our understanding of LIPSS formation in silicon and their applications in surface functionalization and SERS, paving the way for sensing platforms. Full article
(This article belongs to the Special Issue Laser-Assisted Micro- and Nano-Fabrications)
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8 pages, 4732 KiB  
Article
Direct Laser Writing of Computer-Generated Holograms by Photodissolution of Silver in Arsenic Trisulfide
by Arjun Karimbana Kandy, Cedric Sebastien Martins Figueiredo, Manuel Fernandez Merino, Antoine Bourgade, Jean-Yves Natoli, Konstantinos Iliopoulos and Julien Lumeau
Optics 2023, 4(1), 138-145; https://doi.org/10.3390/opt4010010 - 31 Jan 2023
Cited by 3 | Viewed by 1203
Abstract
Photodissolution is a process that is well known for its ability to cause inclusion of silver into the matrix of a chalcogenide layer, changing its optical properties. In this paper, using e-beam deposition, we developed Ag (74 nm)/As2S3 (355 nm) [...] Read more.
Photodissolution is a process that is well known for its ability to cause inclusion of silver into the matrix of a chalcogenide layer, changing its optical properties. In this paper, using e-beam deposition, we developed Ag (74 nm)/As2S3 (355 nm) bilayers and characterized the photodissolution kinetics when exposed to actinic radiation. We showed that local complete silver photodissolution at the micron scale can be achieved. Based on this result, we then developed amplitude-based computer-generated holograms using direct laser writing. CW lasers with beam shaping and short pulse lasers with beam scanning were both implemented. Elements with 8.5 µm and <1 µm spatial resolution and close to theoretical intensity distribution, respectively, were successfully demonstrated. Full article
(This article belongs to the Special Issue Laser-Assisted Micro- and Nano-Fabrications)
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