Nanosecond near-IR lasers are commonly used for industrial laser processing. In this paper, we demonstrate that a 70 μm diameter beam generated from a 5 W, 28 ns, near-IR (1064 nm) Nd:YAG laser can etch a silicon wafer with a lateral feature size as small as 1.3 μm. Surprisingly with this laser, microetching can also be achieved on glass, despite the low absorption of this material at this wavelength. This breakthrough is carried out in ambient air by using glass microspheres with diameters between 4 and 40 μm that generate a concentrated beam at their vicinity, a phenomenon referred to as a photonic jet. The roles of parameters such as laser fluence, pulse number, microsphere diameter, and distance between the microsphere and the sample are discussed. A good correlation has been observed between the computed photonic jet intensity distribution and the etched marks' geometry.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/AO.53.007202 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Direct Frequency Comb Cavity Ring-Down Spectroscopy Using Vernier Filtering.
J Phys Chem A
January 2025
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
We present direct frequency comb cavity ring-down spectroscopy with Vernier filtering as a straightforward approach to sensitive and multiplexed trace gas detection. The high finesse cavity acts both to extend the interaction length with the sample and as a spectral filter, alleviating the need for dispersive elements or an interferometer. In this demonstration, a free running interband cascade laser was used to generate a comb centered at 3.
View Article and Find Full Text PDFThe role of intramolecular hydrogen bonding in photoelectron circular dichroism: the diastereoisomers of 1-amino-2-indanol.
Phys Chem Chem Phys
January 2025
Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France.
(1,2)--Aminoindanol and (1,2)--aminoindanol, denoted as -AI and -AI, are diastereoisomer aromatic aminoalcohols differing by the presence of a weak intramolecular hydrogen bond in -AI, which is absent in -AI. They also differ by the number of conformers under supersonic jet conditions, one for -AI and two for -AI. One-photon and resonance-enhanced two-photon photoelectron circular dichroism (PECD) spectra are obtained for the two molecules.
View Article and Find Full Text PDFGas-Thermal Spraying Synthesis of β-GaO Luminescent Ceramics.
Materials (Basel)
December 2024
Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia.
This paper presents the initial results of the synthesis of β-GaO luminescent ceramics via plasma gas-thermal spraying synthesis, where low-temperature plasma of an argon and nitrogen mixture was employed. A direct current electric arc generator of high-enthalpy plasma jet with a self-aligning arc length and an expanding channel of an output electrode served as a plasma source. The feedstock material consisted of a polydisperse powder of monocrystalline β-GaO with particle sizes ranging from 5 to 50 μm.
View Article and Find Full Text PDFPhenomenology of photons-enriched semi-visible jets.
Eur Phys J C Part Fields
November 2024
ETH Zürich, Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland.
Article Synopsis
- This letter proposes a new method for identifying confining dark sectors at the LHC through the detection of semi-visible jets resulting from collisions involving dark quarks from a hidden sector.
- It explains how these semi-visible jets can produce non-isolated photons and stable/unstable dark bound states, which may not align with current search strategies at the LHC.
- The authors suggest using a deep neural network to differentiate these exotic jets from background noise by analyzing their unique substructure, allowing for potential discoveries of heavy bosons with masses up to 5 TeV using data from the LHC's Run 2.
Printed Nanomaterials for All-in-One Integrated Flexible Wearables and Bioelectronics.
ACS Appl Mater Interfaces
December 2024
Wearable Intelligent Systems and Healthcare Center (WISH Center), Institute for Matter and Systems, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Recent advancements in printing technologies allow for fabricating various wearable sensors, circuits, and integrated electronics. However, most printing tools have limited ranges of handling ink viscosity, a short working distance, and a limited feature size for developing sophisticated electronics. Here, this paper introduces an all-in-one integrated wearable electronic system via multilayer, multinanomaterial printing.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!