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Making waves with quantum wells and metasurfaces
In our most recent publication, we combine quantum-engineered semiconductor materials with metasurfaces to realise giant nonlinear optical responses at near-infrared wavelengths. Engineered semiconductor materials allow us to tailor their nonlinear...
Artistic rendering

Blocked, but not broken: self healing of Montgomery patterns
In the latest publication from our group, Athena Xu and colleagues have experimentally demonstrated self-healing of the Montgomery pattern, showing that these self-imaging light fields can reconstruct themselves after passing through an obstruction...
Experimental demonstration of self healing of Montgomery pattern

Special Issue of Nanophotonics in honor of Federico Capasso
Nanophotonics has dedicated its latest special issue to Professor Federico Capasso, recognizing his pioneering work and his ongoing influence across the field. The issue features 47 invited papers from groups across the community, along with anecdotes and...
Nanophotonics Vol 14 Issue 23 cover

Tunable Ring Laser Chips Broaden Mid-Infrared Wavelength Control
Tunable semiconductor lasers are vital for applications ranging from high-speed telecommunications to gas sensing and medical diagnostics, but existing devices face trade-offs in tuning range, accuracy, and complexity. Theodore P. Letsou, Johannes...
Artistic rendering of tunable ring laser

Integrated Soliton Chips Illuminate the Mid-Infrared

Integrated light-pulse generators are instrumental in driving data communication systems and spectroscopic sensors. Despite their ubiquity across diverse applications, such chips had not existed for the mid-infrared spectrum—until now. Dmitry Kazakov...
QCL

“Optical Rotatum” — A New Twist in Light
Vortices are a fundamental phenomenon observed throughout nature, from fluid dynamics and condensed matter systems to the formation of galaxies. In a recent publication, Dorrah et al. introduce the optical rotatum—a new class of light vortex that not only...
Optical Rotatum

Harvard-born startup Metalenz featured in the Harvard Gazette
Metalenz, a startup cofounded by Capasso Group alumnus Rob Devlin and Professor Federico Capasso, and based on metasurface research conducted during Devlin's time at Harvard, is featured in a new article by The Harvard Gazette. The piece traces the...
Image from Metalenz