Federico Capasso
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View article: Ultrafast space-time optical merons in momentum-energy space
Ultrafast space-time optical merons in momentum-energy space Open
Skyrmions, topologically non-trivial localized spin structures, are fertile ground for exploring emergent phenomena in condensed matter physics and next-generation magnetic-memory technologies. Although magnetics and optics readily lend th…
View article: Structuring light waves in 3D volumes with high precision using communication mode optics
Structuring light waves in 3D volumes with high precision using communication mode optics Open
Achieving precise control of light intensity in 3D volumes is highly in demand in many applications in optics. Various wavefront shaping techniques have been utilized to reconstruct a target amplitude profile within a 3D space. However, th…
View article: Continuously and widely tunable semiconductor ring lasers
Continuously and widely tunable semiconductor ring lasers Open
Tunable semiconductor lasers are indispensable for applications ranging from spectroscopy to telecommunications, yet achieving continuous, mode-hop-free tuning across broad frequency ranges in a compact, robust device remains challenging. …
View article: The carbonyl sulfide terahertz laser and the effects of pump saturation
The carbonyl sulfide terahertz laser and the effects of pump saturation Open
Quantum cascade laser pumped molecular lasers (QPMLs) are capable of widely tunable emissions ranging from 0.1 to almost 10 THz. The QPML concept allows almost any gas composed of molecules with non-zero electric dipole moments to serve as…
View article: Flat, wide field-of-view imaging polarimeter
Flat, wide field-of-view imaging polarimeter Open
Stokes imaging polarimetry is the measurement of light’s polarization state over a photographic scene. Measuring a Stokes vector image requires capturing multiple projective polarization state images. New hardware and approaches for acquir…
View article: Driven bright solitons on a mid-infrared laser chip
Driven bright solitons on a mid-infrared laser chip Open
Despite the continuing progress in integrated optical frequency comb technology1, compact sources of short, bright pulses in the mid-infrared wavelength range from 3 to 12 μm so far remain beyond reach. The state-of-the-art ultrafast pulse…
View article: Rotatum of light
Rotatum of light Open
Vortices are ubiquitous in nature and can be observed in fluids, condensed matter, and even in the formation of galaxies. Light, too, can evolve like a vortex. Optical vortex beams are exploited in light-matter interaction, free space comm…
View article: Cascaded-mode interferometers: Spectral shape and linewidth engineering
Cascaded-mode interferometers: Spectral shape and linewidth engineering Open
Interferometers are essential tools for measuring and shaping optical fields, widely used in optical metrology, sensing, laser physics, and quantum mechanics. They superimpose waves with a mutual phase delay, modifying light intensity. A f…
View article: High-power quantum walk frequency combs
High-power quantum walk frequency combs Open
High-power, broadband frequency combs generated by semiconductor lasers have profound implications for on-chip spectroscopy. Here, we present a dry-etched racetrack quantum cascade laser that uses resonant radio-frequency injection to prod…
View article: Heterogeneous Freeform Metasurfaces: A Platform for Advanced Broadband Dispersion Engineering
Heterogeneous Freeform Metasurfaces: A Platform for Advanced Broadband Dispersion Engineering Open
Metasurfaces, with their ability to control electromagnetic waves, hold immense potential in optical device design, especially for applications requiring precise control over dispersion. This work introduces an approach to dispersion engin…
View article: Grayscale to Hyperspectral at Any Resolution Using a Phase-Only Lens
Grayscale to Hyperspectral at Any Resolution Using a Phase-Only Lens Open
We consider the problem of reconstructing a HxWx31 hyperspectral image from a HxW grayscale snapshot measurement that is captured using only a single diffractive optic and a filterless panchromatic photosensor. This problem is severely ill…
View article: Optimal structured light waves generation in 3D volumes using communication mode optics
Optimal structured light waves generation in 3D volumes using communication mode optics Open
Achieving precise control of light intensity in 3D volumes is highly in demand in many applications in optics. Various wavefront shaping techniques have been utilized to reconstruct a target amplitude profile within a 3D space. However, th…
View article: Conformal holography with curved light sheets
Conformal holography with curved light sheets Open
Projecting images onto arbitrary curved surfaces is a sought-after goal in computer-generated holography applications. However, achieving high axial resolution with a low level of cross-talk using a single computer-generated hologram is st…
View article: Cascaded-mode interferometers: spectral shape and linewidth engineering
Cascaded-mode interferometers: spectral shape and linewidth engineering Open
Interferometers are essential tools to measure and shape optical fields, and are widely used in optical metrology, sensing, laser physics, and quantum mechanics. They superimpose waves with a mutual phase delay, resulting in a change in li…
View article: Free-standing bilayer metasurfaces in the visible
Free-standing bilayer metasurfaces in the visible Open
Mult-layered meta-optics have enabled complex wavefront shaping beyond their single layer counterpart owing to the additional design variables afforded by each plane. For instance, complex amplitude modulation, generalized polarization tra…
View article: Temporal solitons in active optical resonators
Temporal solitons in active optical resonators Open
Solitons, as coherent structures that maintain their shape while traveling at constant velocity, are ubiquitous across various branches of physics, from fluid dynamics to quantum fields. However, it is within the realm of optics where soli…
View article: Lasing on hybridized soliton frequency combs
Lasing on hybridized soliton frequency combs Open
Coupling is an essential mechanism that drives complexity in natural systems, transforming single, non-interacting elements into intricate networks with rich physical properties. Here, we demonstrate a chip-scale coupled laser system that …
View article: Hot Carrier Nanowire Transistors at the Ballistic Limit
Hot Carrier Nanowire Transistors at the Ballistic Limit Open
We demonstrate experimentally nonequilibrium transport in unipolar quasi-1D hot electron devices reaching the ballistic limit at room temperature. The devices are realized with heterostructure engineering in nanowires to obtain dopant- and…
View article: Addition to “All-Glass 100 mm Diameter Visible Metalens for Imaging the Cosmos”
Addition to “All-Glass 100 mm Diameter Visible Metalens for Imaging the Cosmos” Open
ADVERTISEMENT RETURN TO ARTICLES ASAPPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionAddition to "All-Glass 100 mm Diameter Visible Metalens for Imaging the Cosmos"Joon-Suh Park*Joon-Suh ParkMore by Joon-Suh Parkhttps…
View article: Multidimensional optical singularities and their applications
Multidimensional optical singularities and their applications Open
Optical singularities, which are positions within an electromagnetic field where certain field parameters become undefined, hold significant potential for applications in areas such as super-resolution microscopy, sensing, and communicatio…
View article: Flat Optics: feature issue introduction
Flat Optics: feature issue introduction Open
This feature issue of Optics Express was created in conjunction with a topical meeting that took place during the 2023 Optica Imaging Congress and includes 17 state-of-the art articles. This introduction provides a summary of these article…
View article: An Interview with Federico Capasso
An Interview with Federico Capasso Open
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTAn Interview with Federico CapassoRomain Quidant*Romain QuidantNanophotonic Systems Laboratory, Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland*E-mail: [email…
View article: Metasurface-Controlled Holographic Microcavities
Metasurface-Controlled Holographic Microcavities Open
Optical microcavities confine light to wavelength-scale volumes and are a key component for manipulating and enhancing the interaction of light, vacuum states, and matter. Current microcavities are constrained to a small number of spatial …
View article: Cluster synchronization in a semiconductor laser
Cluster synchronization in a semiconductor laser Open
Cluster synchronization is a general phenomenon in a network of non-locally coupled oscillators. Here, we show that cluster synchronization occurs in semiconductor lasers, where the beat notes between the pairs of adjacent longitudinal mod…
View article: Driven bright solitons on a mid-infrared laser chip
Driven bright solitons on a mid-infrared laser chip Open
Despite the ongoing progress in integrated optical frequency comb technology, compact sources of short bright pulses in the mid-infrared wavelength range from 3 μm to 12 μm so far remained beyond reach. The state-of-the-art ultrafast pulse…
View article: Active mid-infrared ring resonators
Active mid-infrared ring resonators Open
High-quality optical ring resonators can confine light in a small volume and store it for millions of roundtrips. They have enabled the dramatic size reduction from laboratory scale to chip level of optical filters, modulators, frequency c…