Sukrith Dev
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Optoelectronic Material Characterization Platform using RF Topological Edge States Open
Efficient characterization of optoelectronic material properties represents a crucial step in the development of next‐generation infrared (IR) materials and devices. For the first time, a sensitive, contact‐free optoelectronic material cha…
View article: High-speed long-wave infrared ultra-thin photodetectors
High-speed long-wave infrared ultra-thin photodetectors Open
The primary challenge for long-wavelength infrared (λ = 8–13 µm) detection has long been the mitigation of dark current while achieving a high conversion efficiency of optical to electrical signals. Often overlooked is the bandwidth of det…
Invertible optical nonlinearity in epsilon-near-zero materials Open
Epsilon-near-zero (ENZ) materials such as indium tin oxide (ITO) have recently emerged as a new platform to enhance optical nonlinearities. Here we report a theoretical and experimental study on the origin of nonlinearities in ITO films th…
Near-field mapping of high permittivity dielectric microwave resonator modes via optically induced conductance Open
In this paper, we demonstrate a straightforward, low-cost, and high resolution optical-based method to measure the three-dimensional relative electric field magnitude in microwave circuits without the need to monitor reflected laser beams …
Invertible Optical Nonlinearity in Epsilon-near-zero Materials Open
Epsilon-near-zero (ENZ) materials such as indium tin oxide (ITO), have recently emerged as a new platform to enhance optical nonlinearities. Here we report a theoretical and experimental study on the origin of nonlinearities in ITO thin fi…
Optical Bound States in the Continuum Enabled by Magnetic Resonances Coupled to a Mirror Open
Dielectric metasurfaces made of high refractive index and low optical loss materials have emerged as promising platforms to achieve high-quality factor modes enabling strong light-matter interaction. Bound states in the continuum have show…
Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes Open
Semiconductor nanowire arrays have been demonstrated as promising candidates for nanoscale optoelectronics applications due to their high detectivity as well as tunable photoresponse and bandgap over a wide spectral range. In the infrared …
Colloidal particle aggregation: mechanism of assembly studied via constructal theory modeling Open
The assembly of colloidal particles into ordered structures is of great importance to a variety of nanoscale applications where the precise control and placement of particles is essential. A fundamental understanding of this assembly mecha…
Coordinate Transformations-Based Antenna Elements Embedded in a Metamaterial Shell with Scanning Capabilities Open
In this work transformation electromagnetics/optics (TE/TO) were employed to realize a non-homogeneous, anisotropic material-embedded beam-steerer using both a single antenna element and an antenna array without phase control circuitry. In…
A Phased Array Antenna with New Elements Designed Using Source Transformations Open
Transformation electromagnetics/optics (TE/TO) has been shown to be a useful technique in designing electromagnetic devices with very unique properties. Here, the concepts of transformation optics for single elements is extended to an arra…
Infrared detection and materials characterization using microwave resonators Open
The radio frequency (RF) and microwave regions of the electromagnetic (EM) spectrum have seen incredible advances over the last few decades. RF components have become more compact, inexpensive, and accessible while still maintaining high p…
View article: RF Read-Out of Minority Carrier Lifetimes in Micro-Scale Infrared Materials
RF Read-Out of Minority Carrier Lifetimes in Micro-Scale Infrared Materials Open
We present micro-scale time-resolved microwave resonator response (μ-TRMRR), a sensitive technique capable of measuring carrier lifetimes in micron-scale materials, something not typically achievable using common techniques like time-resol…
Extending the Operating Wavelength of Type-I InAs Quantum Well Lasers on InP Open
I will discuss our recent work on type-I InAs quantum well lasers grown on InAsP/InP buffers with room-temperature operation at 2.76 µm. Efforts to extend the wavelength beyond 3.0 µm will also be described.
Enhanced responsivity resonant RF photodetectors Open
The responsivity of room-temperature, semiconductor-based photodetectors consisting of resonant RF circuits coupled to microstrip buslines is investigated. The dependence of the photodetector response on the semiconductor material and RF c…
Mid-IR plasmon-mediated photoluminescence from gallium-doped zinc oxide bow-tie nanoantennas Open
Semiconductor devices that interact with mid-infrared (mid-IR) wavelengths have a variety of applications in communications, sensing, and defense. However, most mid-IR sources, particularly incoherent emitters, are practically limited as a…