We demonstrate enhanced generation of coherent light in the "water window" region of the soft x-ray spectrum at 4.4 nanometers, using quasi-phase-matched frequency conversion of ultrafast laser pulses. By periodically modulating the diameter of a gas-filled hollow waveguide, the phase mismatch normally present between the laser light and the generated soft x-ray light can be partially compensated. This makes it possible to use neon gas as the nonlinear medium to coherently convert light up to the water window, illustrating that techniques of nonlinear optics can be applied effectively in the soft x-ray region of the spectrum. These results advance the prospects for compact coherent soft x-ray sources for applications in biomicroscopy and in chemical spectroscopy.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.1088654 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Undifferentiated pleomorphic sarcoma in the maxillary sinus: a case report.
J Med Case Rep
January 2025
Department of Oral and Maxillofacial Pathology, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Background: Undifferentiated pleomorphic sarcoma, previously called malignant fibrous histiocytoma, is a type of malignant mesenchymal tumor (sarcoma) of soft tissue and sometimes bone. It is uncommon in the oral cavity and very sporadic in the maxillary sinus. Microscopic diagnosis of this malignancy in the maxillary sinus can be very challenging, because there is a range of features that may overlap with other benign and malignant tumors.
View Article and Find Full Text PDFRadiological findings on computed tomography examinations of adult patients in the emergency department of a tertiary care hospital.
Radiol Bras
January 2025
Escola de Medicina - Universidade de Passo Fundo (UPF), Passo Fundo, RS, Brazil.
Objective: To identify and analyze the main findings on computed tomography (CT) scans ordered in the emergency department of a tertiary care hospital.
Materials And Methods: This was a cross-sectional observational study conducted through analysis of CT scans of the head, chest, and abdomen of all patients admitted to the emergency department of a tertiary care hospital over a period of four months.
Results: Among a sample of 331 patients, pathological radiological findings were observed in 59.
Treatment of Patients With Extraskeletal Ewing Sarcoma in the Scapular and Arm Regions With Wide Resection: A Report of Two Cases and Literature Review.
Cureus
December 2024
Department of Orthopaedics and Traumatology, Cerrahpasa Faculty of Medicine, Istanbul University - Cerrahpasa, Istanbul, TUR.
Extraskeletal Ewing sarcoma (EES) is a rare and aggressive malignancy originating in soft tissues, distinct from osseous Ewing sarcoma. It commonly affects adolescents and young adults but can occur at any age. Due to its rarity and overlapping clinical features with other malignancies, EES poses significant diagnostic and therapeutic challenges.
View Article and Find Full Text PDFExtra-adrenal Pheochromocytoma of the Urinary Bladder in an Adolescent Female Patient.
Cureus
December 2024
Pediatric Radiology, Detroit Medical Center, Wayne State University, Detroit, USA.
Pheochromocytoma is a catecholamine-secreting tumor that arises from the medullary chromaffin cells but can rarely be extra-adrenal in origin. We present a case of a 16-year-old female patient with uncontrolled hypertension, despite being on lisinopril and metoprolol, and associated left-sided chest pain, recurrent headaches, and an unintentional weight loss of 10 pounds in one month. Laboratory work-up showed a markedly elevated plasma metanephrine level of 4463.
View Article and Find Full Text PDFThe Unusual Mesophases and Properties Exhibited by a Family of Glycosteroids.
Chemistry
January 2025
Universite Claude Bernard Lyon 1, ICBMS, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622, Villeurbanne, FRANCE.
In this article we describe research on the synthesis and characterization of a family of "Janus" amphiphiles composed of disaccharide head groups and alkaloid units joined together via a methylene linker, and bearing a lateral aliphatic chain of varying length. The condensed phases formed by self-organization of the products as a function of temperature were characterized by differential scanning calorimetry, thermal polarized light microscopy, and small angle X-ray scattering, allied with computational modelling and simulations. Structural studies on heating specimens from the solid showed that some homologues exhibited lamellar, columnar and bicontinuous mesophases, whereas the same homologues revealed different phase sequences on cooling from the amorphous liquid.
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!