Glancing angle deposition meets colloidal lithography: a new evolution in the design of nanostructures
The combination of colloidal lithography and glancing angle deposition facilitates a new powerful fabrication technique – shadow sphere lithography (SSL), which can greatly expand the variety and complexity of nanostructures fabricated using simple …
Digital laser micro- and nanoprinting
Laser direct writing is a well-established ablation technology for high-resolution patterning of surfaces, and since the development of additive manufacturing, laser processes have also appeared very attractive for the digital fabrication of three-dimensional …
Magnetic hot-spot generation at optical frequencies: from plasmonic metamolecules to all-dielectric nanoclusters
The weakness of magnetic effects at optical frequencies is directly related to the lack of symmetry between electric and magnetic charges. Natural materials cease to exhibit appreciable magnetic phenomena at rather low frequencies and become unemployable for …
Nonlinear optical properties and applications of 2D materials: theoretical and experimental aspects
In this review, we survey the recent advances in nonlinear optics and the applications of two-dimensional (2D) materials. We briefly cover the key developments pertaining to research in the nonlinear optics of graphene, the quintessential 2D material. …
Intraoperative biophotonic imaging systems for image-guided interventions
Biophotonic imaging has revolutionized the operation room by providing surgeons intraoperative image-guidance to diagnose tumors more efficiently and to resect tumors with real-time image navigation. Among many medical imaging modalities, near-infrared (NIR) …
Broadband terahertz absorber based on dispersion-engineered catenary coupling in dual metasurface
Terahertz (THz) absorbers have attracted considerable attention due to their potential applications in high-resolution imaging systems, sensing, and imaging. However, the limited bandwidth of THz absorbers limits their further applications. Recently, the …
Gain lifetime characterization through time-resolved stimulated emission in a whispering-gallery mode microresonator
The precise measurement of gain lifetime at a specific wavelength holds significant importance for understanding the properties of photonic devices and further improving their performances. Here, we show that the evolution of gains can be well characterized …
Coherent surface plasmon amplification through the dissipative instability of 2D direct current
We propose an original concept for on-chip excitation and amplification of surface plasmon polaritons. Our approach, named nanoresotron, utilizes the collective effect of dissipative instability of a 2D direct current flowing in vicinity of a metal surface. …
Time-domain dynamics of reverse saturable absorbers with application to plasmon-enhanced optical limiters
An advanced full-wave time-domain numerical model for reverse saturable absorption (RSA) is presented and verified. Rate equations describing atomic relaxations and excitation dynamics are coupled to the Maxwell equations by using a Lorentzian oscillator, …
Large phase modulation of THz wave via an enhanced resonant active HEMT metasurface
Terahertz (THz) science and technology promise unique applications in high-speed communications, high-accuracy imaging, and so on. To keep up with the demand for THz systems, THz dynamic devices should feature large phase shift modulation and high speed. To …
Design of aluminum nitride metalens for broadband ultraviolet incidence routing
Ultraviolet (UV) photonics-based device and equipment have various applications in sterilization, military covert communication, medical treatment, nanofabrication, gem identification and so on. The traditional constituent UV components are bulky, …