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Image of the Week

Striking images of optics and photonics, contributed by OPN readers

Laser engraving DIC
Laser engraving DIC

Laser engraving on a cellphone chip observed using DIC contrast technique in reflected light. The colors observed in the image are not the colors of the piece itself but the interference colors where the tones yellows, orange and red are coincident with zones with residual stress. Image created using a 50x/0.8 objective.

—Jose Manuel Martinez Lopez, Quimica Tech, Chihuahua, Mexico

20 May 2022

Supercontinuum Light
Supercontinuum Light

Supercontinuum light generated by the self-phase-modulation effect in a microstructured fiber, dispersed by a prism. Long exposure (20 s) taken with an SLR camera.

—Raúl Rangel-Rojo, Department of Optics, CICESE, Mexico

13 May 2022

3.6 Billion Years in Color
3.6 Billion Years in Color

The Pilbara, northwestern Australia, which exposes some of the oldest rocks on Earth—over 3.6 billion years old—is captured in a composite image by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on the Terra satellite.

—NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team

06 May 2022

Colored Perovskite Cells
Colored Perovskite Cells

A colored version of perovskite solar cells created by mimicking stained glass. The colors are generated by a metal-insulator-metal and show Janus colors on each side, which could open new possibilities for window design.

—Young Min Song, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea

29 Apr 2022

Sunset over the Himalayas
Sunset over the Himalayas

A glimpse of dusk behind the Himalayan cliffs.

—Vipin Tiwari, Kumaun University, Nainital, India

22 Apr 2022

Indicative Silica Gels
Indicative Silica Gels

Macro photo of indicative silica gels. As the silica gel absorb moisture from the air, the cobalt chloride crystals inside the gels turn from blue to pink.

—Anastasios D. Koulouklidis, Institute of Electronic Structure and Laser of the Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece

15 Apr 2022

Sulfide Ceramic Structures
Sulfide Ceramic Structures

Interface of two phases on the microstructure of a promising optical and thermoelectric sulfide ceramic. Taken using a Zeiss SEM at the Materials Characterization Facility, University of Central Florida.

—Matthew Havel, University of Central Florida, Orlando, FL, USA

08 Apr 2022

High-Harmonic Generation
High-Harmonic Generation

A high-power femtosecond infrared laser, focused into a pressurized argon jet in a high-vacuum chamber, creates a glowing plasma. In the plasma, the highly nonlinear process of high-harmonic generation (HHG) generates coherent harmonics from the infrared all the way to the extreme-UV and soft-X-ray regimes, which can be used for coherent imaging.

—Sven Weerdenburg, Delft University of Technology, Delft, Netherlands

01 Apr 2022

Analog Metacrystal
Analog Metacrystal

Sectional views of a solid crystal detailing the inner structure of a computed optical system where encryption is defined by the topological structure.

—Stefan Samociuk, Penlon, UK

25 Mar 2022

Abstract Optics
Abstract Optics

An artistic take exploring the use of phosphors in white LEDs. The collage of UV and VIS images may bring to mind abstract paintings such as those of Mark Rothko. (Close-up images of a white LED array, taken with an iPhone in white light and UV illumination.)

—Catalin Florea, Voyage Photonics, Philadelphia, PA, USA

18 Mar 2022

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