F. Amirkhan
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View article: Terahertz time-domain derivative spectrometer using a large-aperture piezoelectric micromachined device
Terahertz time-domain derivative spectrometer using a large-aperture piezoelectric micromachined device Open
The engineering of optomechanical systems has exploded over the past decades, with many geometries and applications arising from the coupling of light with mechanical motion. The modulation of electromagnetic radiation in the terahertz (TH…
View article: Active terahertz time differentiator using piezoelectric micromachined ultrasonic transducer array
Active terahertz time differentiator using piezoelectric micromachined ultrasonic transducer array Open
The rapid growth of information technology is closely linked to our ability to modulate and demodulate a signal, whether in the frequency or in the time domain. Recent demonstrations of terahertz (THz) modulation involve active semiconduct…
View article: Transmission of Orbital Angular Momentum and Cylindrical Vector Beams in a Large-Bandwidth Annular Core Photonic Crystal Fiber
Transmission of Orbital Angular Momentum and Cylindrical Vector Beams in a Large-Bandwidth Annular Core Photonic Crystal Fiber Open
The stable propagation of orbital angular momentum and cylindrical vector beams in a newly designed annular core photonic crystal fiber (AC-PCF) tailored for the broadband single-radial order beam transmission (within the so-called “endles…
View article: Simulation study of a piezoelectric micromachined ultrasonic transducer as terahertz differentiator
Simulation study of a piezoelectric micromachined ultrasonic transducer as terahertz differentiator Open
We propose a simple method to differentiate a THz pulse using a piezoelectric micromachined ultrasonic transducer (PMUT). We demonstrate with simulations that the modulated THz signal after PMUT is proportional to the first-order derivativ…
View article: Characterization of thin film optical properties by THz near-field imaging method
Characterization of thin film optical properties by THz near-field imaging method Open
We present a new method to characterize thin film electro-optic and magneto-optic materials. The method is based on resolving the electric and/or magnetic field distributions in the near-field region of a split ring resonator (SRR) designe…
View article: Single-Mode Operation in Flat Fibers Slab Waveguide via Modal Leakage
Single-Mode Operation in Flat Fibers Slab Waveguide via Modal Leakage Open
An approach to obtain single-mode operation on a semirectangular large core area Flat Fiber (FF) slab waveguide is proposed. A new design of FF with two defect eye holes is presented, and its single-mode guiding is analyzed by simulation. …