Henrik Melkonyan
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View article: Optical cloaking of macroscopic objects by geometric-phase vortex processing
Optical cloaking of macroscopic objects by geometric-phase vortex processing Open
We report on free-space strategy for electromagnetic concealment of three-dimensional macroscopic objects in the optical domain owing to unique energy flow redirection capabilities enabled by optical phase singularities. We propose and imp…
View article: A review of focused ion beam applications in optical fibers
A review of focused ion beam applications in optical fibers Open
Focused ion beam (FIB) technology has become a promising technique in micro- and nano-prototyping due to several advantages over its counterparts such as direct (maskless) processing, sub-10 nm feature size, and high reproducibility. Moreo…
View article: Embedded parabolic fiber lens for efficient fiber-to-waveguide coupling fabricated by focused ion beam
Embedded parabolic fiber lens for efficient fiber-to-waveguide coupling fabricated by focused ion beam Open
This work demonstrates an approach for simplifying fiber-to-chip (edge coupling) packaging by virtually eliminating the longitudinal alignment procedure (also increasing compactness and efficiency) through a fiber lens embedded into the st…
View article: Efficient Fiber-to-Waveguide Edge Coupling Using an Optical Fiber Axicon Lens Fabricated by Focused Ion Beam
Efficient Fiber-to-Waveguide Edge Coupling Using an Optical Fiber Axicon Lens Fabricated by Focused Ion Beam Open
Efficient edge coupling into a silicon waveguide is demonstrated using an optical fiber axicon lens operating at 1550 nm. The axicon was fabricated on the cleaved endfacet of an SMF-28e optical fiber using a focused ion beam milling proces…
View article: Gradient-index optical fiber lens for efficient fiber-to-chip coupling
Gradient-index optical fiber lens for efficient fiber-to-chip coupling Open
A gradient-index optical fiber lens is proposed and fabricated on the tip of a single-mode fiber using focused ion beam milling. Second-order effective medium theory is used to design a gradual change in the fill factor, which ensures a pa…