Publications
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Mode splitting and resonant coupling between a slot metasurface and PMMA
(2014-08-18)A slot metasurface (metascreen) designed to have resonance that couples with the 1733 cmˉ¹ absorption peak of the C=O molecular bond of PMMA (polymethyl methacrylate) is presented. The metasurface is made of a gold layer ... -
Universal liquid level sensor employing fresnel coefficient based discrete fiber optic measurement technique
(2014-08-18)A compact and light weight liquid-level-measuring system based on fiber-optics sensor technology is presented as alternative to systems based on float gauges and other conventional level sensors for liquids that pose fire, ... -
Architecture of an all optical de-multiplexer for spatially multiplexed channels
(2013-04-29)Multiple channels of light can propagate through a multimode fiber without interfering with each other and can be independently detected at the output end of the fiber using spatial domain multiplexing (SDM). Each channel ... -
Analysis of spatial domain multiplexing/space division multiplexing (SDM) based hybrid architectures operating in tandem with wavelength division multiplexing
(2014-08-18)Spatial domain multiplexing (SDM) also known as space division multiplexing adds a new degree of photon freedom to existing optical fiber multiplexing techniques by allocating separate radial locations to different MIMO ... -
CAD model for co-propagating spatially multiplexed channels of same wavelength over standard multimode fibers
(2009-04-28)Spatial Domain Multiplexing (SDM) is a novel technique that allows co-propagation of two or more optical communication channels of the same wavelengths over a single strand of optical fiber cable by maintaining spatial ... -
Denoising using adaptive thresholding and higher order statistics
(2009-03-19)We showed that a hard threshold for wavelet denoising based on higher order statistics is comparable to a second order soft threshold. The hard threshold can be made adaptive by using a third order statistic as an estimate ... -
Collection efficiency for millimeter and submillimeter wave antenna-coupled detection
(2015-04-20)The goal in the design of an efficient and low-noise antenna coupled receiver is to achieve a maximal capture cross section for the incident electromagnetic radiation compared to the dimensions of the sub-wavelength sized ... -
An order of magnitude improvement in optical fiber bandwidth using spatial domain multiplexing/space division multiplexing (SDM) in conjunction with orbital angular momentum (OAM)
(2014-08-18)Spatial Domain Multiplexing/Space Division Multiplexing (SDM) can increase the bandwidth of existing and futuristic optical fibers by an order of magnitude or more. In the SDM technique, we launch multiple single mode ... -
Enhancing thermal video using a public database of images
(2014-05-06)We presented a system to display nightime imagery with natural colors using a public database of images. We initially combined two spectral bands of images, thermal and visible, to enhance night vision imagery, however the ... -
Analysis and comparison of experimental and simulated results for an omnidirectional free space optical receiver architecture
(2014-08-18)Lasercomm or Free Space Optical (FSO) communication has the potential to provide fiber optic data rates without the need for wired physical connectivity. This paper investigates the feasibility of an Omnidirectional FSO ... -
Color night vision system for ground vehicle navigation
(2014-05-05)Operating in a degraded visual environment due to darkness can pose a threat to navigation safety. Systems have been developed to navigate in darkness that depend upon differences between objects such as temperature or ... -
Infrared surface phonon polariton waveguides on SiC Substrate
(2015-08-09)Surface plasmon polariton (SPP) waveguides harbor many potential applications at visible and near-infrared (NIR) wavelengths. However, dispersive properties of the metal in the waveguide yields weakly coupled and lossy ... -
Near real-time operation of public image database for ground vehicle navigation
(2015-02-10)An effective color night vision system for ground vehicle navigation should operate in near real-time to be practical. We described a system that uses a public database as a source of color information to colorize night ... -
Concentric circles based simple optical landing aid for vertical takeoff and landing aircrafts
(2014-08-18)Vertical takeoff and landing (VTOL) aircrafts such as helicopters and drones, add a flexible degree of operation to airborne vehicles. In order to operate these devices in low light situations, where it is difficult to ... -
Analysis of an all optical de-multiplexer architecture utilizing bevel design for spatially multiplexed optical fiber communication systems
(2014-08-18)Spatial domain multiplexing (SDM) is a system that allows multiple channels of light to traverse a single fiber, utilizing separate spatial regions inside the carrier fiber, thereby applying a new degree of photon freedom ... -
A new multispectral imaging instrument for in-situ characterization of flocs and colloidal aggregates in natural waters
(2016-04-17)In-situ sampling, characterization and quantification of colloidal aggregates and flocs in ambient water is complex but needed in order to understand their role in development and maintenance of moving fluid muds, muck, ... -
Optical directional coupler and Mach-Zehnder interferometer enhanced via 4H-SiC phonons
(2016-08-28)Surface phonon polaritons (SPhPs), similar to it cousin phenomenon surface plasmon polaitons (SPPs), are quasi-neutral particles resulting from light-matter coupling that can provide high modal confinement and long propagation ... -
Multi-coupled resonant splitting with a nano-slot metasurface and PMMA phonons
(2015-08-09)Coupled-resonances can be used in applications that include, but are not limited to, surface-enhanced infrared spectroscopy (SEIRS), surface-enhanced Raman spectroscopy (SERS), biosensing, and index sensing. Fano resonance ... -
Impedance-matching analysis in IR leaky-wave antennas
(2015-08-09)Planar leaky-wave antennas (LWA) that are capable of full-space scanning have long since been the pursuit for applications including, but not limited to, integration onto vehicles and into cameras for wide-angle of view ... -
Shape-based recognition of targets in synthetic aperture radar images using elliptical fourier descriptors
(2008-04-14)This paper primarily investigates the use of shape-based features by an Automatic Target Recognition (ATR) system to classify various types of targets in Synthetic Aperture Radar (SAR) images. In specific, shapes of target ...
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