48 citations · 94 across the 10 of their papers we have counts for
15 papers
Interaction between a Waveguide Mode and an Absorptive Medium
Hadi Amarloo, Safieddin Safavi-Naeini
Absorption spectroscopy studies the absorption of electromagnetic wave in a material sample under test. The interacting electromagnetic wave can be propagating in free space or in…
Millimeter-Wave Circular Synthetic Aperture Radar Imaging
Shahrokh Hamidi, Safieddin Safavi-Naeini
In this paper, we present a high resolution microwave imaging technique using a compact and low cost single channel Frequency Modulated Continuous Wave (FMCW) radar based on Circul…
3D Near-Field Millimeter-Wave Synthetic Aperture Radar Imaging
Shahrokh Hamidi, Safieddin Safavi-Naeini
In this paper, we present 3D high resolution radar imaging process at millimeter-Wave (mmWave) frequencies by creating the effect of a large aperture synthetically. We use a low co…
Single Channel MMWave FMCW Radar for 2D Target Localization
Shahrokh Hamidi, Safieddin Safavi-Naeini
In this paper, we present a 2D target localization method using two low cost and compact Mellimeter Wave Frequency Modulated Continuous Wave (MMW-FMCW) radars. To create a 2D map w…
CDM Based Virtual FMCW MIMO Radar Imaging at 79GHz
Shahrokh Hamidi, Safieddin Safavi-Naeini
Multiple Input Multiple Output (MIMO) Frequency Modulated Continuous Wave (FMCW) radars operating at 79GHz are compact, light and cost effective devices with low peak-to-average po…
Learning in the Sky: An Efficient 3D Placement of UAVs
Atefeh Hajijamali Arani, M. Mahdi Azari, William Melek +1
Deployment of unmanned aerial vehicles (UAVs) as aerial base stations can deliver a fast and flexible solution for serving varying traffic demand. In order to adequately benefit of…
Glucose Levels Sensing using Whispering Gallery Modes at mm-Wave Band
Ala Eldin Omer, George Shaker, Safieddin Safavi-Naeini
In this study, an integrated low-cost and complexity mm-wave structure of Whispering Gallery Mode (WGM) is proposed for sensing the glucose levels in mimicking aquatic solutions of…
Triple-Poles Complementary Split Ring Resonator for Sensing Diabetics Glucose Levels at cm-Band
Ala Eldin Omer, George Shaker, Safieddin Safavi-Naeini +3
Microwave sensors are very promising for sensing the blood glucose levels non-invasively for their non-ionizing nature, miniaturized sizing, and low health risks for diabetics. All…
Experimental Characterization of Ultrafast, Tunable and Broadband Optical Kerr Nonlinearity in Graphene
Siddharatha Thakur, Behrooz Semnani, Safieddin Safavi-Naeini +1
In this study we systematically measure the near-infrared spectral dependence, the sub-picosecond temporal evolution and pulse-width dependence of the effective Kerr coefficient ($…
Microscopic Origin of Regeneration Noise in Relaxation Oscillator and its Macroscopic Circuit Manifestation
Y. Ng, B. Leung, M. Kononenko +1
This paper augments the existing macroscopic circuit noise model for phase noise in relaxation oscillators by showing the microscopic origins of the noise and explains temperature…
Anomalous optical saturation of low-energy Dirac states in graphene and its implication for nonlinear optics
Behrooz Semnani, Roland Jago, Safieddin Safavi-Naeini +3
We reveal that optical saturation of the low-energy states takes place in graphene for arbitrarily weak electromagnetic fields. This effect originates from the diverging field-indu…
Bistable Circuit Behaviour as a 2 level (stable/metastable) potential energy system
Bosco Leung, Yon Chiet Ng, Safieddin Safavi-Naeini
A novel model of analyzing Schmitt trigger as 2 level (metastable/stable) energy system is presented. The energy of the 2 level system is identified. In an MOS implementation, this…
Nonlinear quantum optical properties of graphene: the role of chirality and symmetry
Behrooz Semnani, Amir Hamed Majedi, Safieddin Safavi-Naeini
We present a semiclassical theory of linear and nonlinear optical response of graphene. The emphasis is placed on the nonlinear optical response of graphene from the standpoint of…
A Fundamental Limit on Propagation Loss of Waveguides with Subwavelength Mode Size
Amir Arbabi, Ehsan Arbabi, Safieddin Safavi-Naeini
A fundamental trade-off relation between the cross sectional confinement and propagation length of an arbitrary mode of a general waveguide is presented. This limit is a generaliza…
Signal Recovery in Pulsed Terahertz Integrated Circuits
Abdorreza Heidari, Mohammad Neshat, Daryoosh Saeedkia +1
In this article, a time-domain calibration procedure is proposed for pulsed Terahertz Integrated Circuits (TIC) used in on-chip applications, where the conventional calibration met…