Nanoscience

Researchers Use Nano-Particles to Increase Power, Improve Eye Safety of Fiber Lasers

By Emanuel Cavallaro May 29, 2020

WASHINGTON — Scientists at the U.S. Naval Research Laboratory have devised a new process for using nano-particles to build powerful lasers that are more efficient and safer for your eyes.

They’re doing it with what’s called “rare-earth-ion-doped fiber.” Put simply, it’s laser light pumping a silica fiber that has been infused with rare earth ions of holmium. According to Jas S. Sanghera, who heads the Optical Materials and Devices Branch, they have achieved an 85 percent efficiency with their new process. More

Nanoscience

U.S. Naval Research Laboratory ‘connects the dots’ for quantum networks

By Mary Estacion, Strategic Communications, U.S. Naval Research Laboratory November 12, 2019

WASHINGTON — Researchers at the U.S. Naval Research Laboratory (NRL) developed a new technique that could enable future advancements in quantum technology.

The technique squeezes quantum dots, tiny particles made of thousands of atoms, to emit single photons (individual particles of light) with precisely the same color and with positions that can be less than a millionth of a meter apart. More

Material Science

NRL Researchers Find Insights into the Formation of the Solar System in Ancient Comet Dust

By Victor Chen, U.S. Naval Research Laboratory Public Affairs November 12, 2019

WASHINGTON — Materials science researchers with the U.S. Naval Research Laboratory have found a remnant of ancient dust from the early stages of the solar system inside a primitive meteorite, named La Paz Icefield 02342 after the location of its discovery in Antarctica. More

Material Science

NRL Develops Laser Processing Method to Increase Efficiency of Optoelectronic Devices

By Daniel Parry, U.S. Naval Research Laboratory Public Affairs April 15, 2019

Scientists at the U.S. Naval Research Laboratory (NRL) discovered a new method to passivate defects in next generation optical materials to improve optical quality and enable the miniaturization of light emitting diodes and other optical elements. More

$Steerable electro-evanescent optical refractor (SEEOR)$

Communications

NRL Demonstrates New Nonmechanical Laser Steering Technology

By Daniel Parry November 19, 2018

Scientists at the U.S. Naval Research Laboratory have recently demonstrated a new nonmechanical chip-based beam steering technology that offers an alternative to costly, cumbersome and often unreliable and inefficient mechanical gimbal-style laser scanners. More

(a) Experimental schematic of conductive atomic force microscopy (CAFM). (b) Sample CAFM image showing eight clearly identifiable defects. (c) Photoluminescence (PL) intensity map of a WS2 triangle. (d) PL intensity and defect density along the dashed black line in (c) showing an inverse relationship between PL intensity and defect density. (U.S. Naval Research Laboratory)

Communications

NRL Research Paves Way Toward Development of New Monolayer Materials

By Daniel Parry November 14, 2018

Scientists at the U.S. Naval Research Laboratory (NRL) have discovered the reason for the large variations observed in the optical properties of new single monolayer semiconductors such as tungsten disulphide (WS₂). Single monolayer transition metal dichalcogenides (TMDs), such as WS₂, are an emerging class of materials that exhibit many promising optoelectronic properties, with the potential for future device applications. More

An emerging class of semiconductor heterostructures involves stacking discrete monolayers such as transition metal dichalcogenides (TMDs), e.g. molybdenum diselenide (MoSe<sub>2</sub>) and tungsten diselenide (WSe<sub>2</sub>), to form van der Waals heterostructures. Both emission features originate from excitonic transitions that are indirect in momentum space and are split by spin−orbit coupling. (U.S. Naval Research Laboratory)

Communications

NRL Researchers Observe Unique Interlayer State in a Bilayer Heterostructure

By Daniel Parry November 2, 2018

Scientists at the U.S. Naval Research Laboratory (NRL) have fabricated a bilayer structure comprised of two different monolayer materials, and observed a unique electronic state formed by the interaction between these two layers. More

Dr. Heonjune Ryou, a postdoctoral fellow in the US Naval Research Laboratory's Chemistry Division, operates machinery used in nanocrystalline ceramics research.

Material Science

NRL researchers push nanoscience boundaries to lighten, strengthen warfighter armor

By Raeanna Morgan April 25, 2018

WASHINGTON — A multi-disciplinary team of researchers at the U.S. Naval Research Laboratory pushed grain size engineering to the limit and recently discovered previously unseen behaviors in nanocrystalline ceramics that could lead to the design of better performing ceramic armor. More

NRL Center for Computational Materials Science Team

Communications

Materials Research Team Lights the Way for More Efficient LEDs

By Daniel Parry January 31, 2018

WASHINGTON — Researchers at the U.S Naval Research Laboratory (NRL) Center for Computational Materials Science, working with an international team of physicists, have revealed that nanocrystals made of cesium lead halide perovskites (CsPbX3), is the first discovered material which the ground exciton state is "bright,” More

Communications

NRL Improves Optical Efficiency in Nanophotonic Devices

By Daniel Parry January 4, 2018

WASHINGTON — A team of physicists, headed by the U.S. Naval Research Laboratory (NRL), have demonstrated the means to improve the optical loss characteristics and transmission efficiency of hexagonal boron nitride devices, enabling very small lasers and nanoscale optics. More

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