59 citations · 151 across the 18 of their papers we have counts for
18 papers
Overcoming the indirect bandgap: efficient silicon emission via momentum-expanded photonic states
Aleksei I. Noskov, Alexander B. Kotlyar, Liat Katrivas +6
Silicon's inherently indirect bandgap severely limits its radiative efficiency, posing a fundamental challenge to the development of practical silicon-based light sources. While st…
Two-photon absorption in silicon using real density matrix approach
David Ziemkiewicz, David Knez, Evan P. Garcia +7
Two-photon absorption in indirect gap semiconductors is an frequently encountered, but not well-understood phenomenon. To address this, the Real Density Matrix Approach is applied…
Electronic Raman scattering in silicon glass
Sergey S. Kharintsev, Elina I. Battalova, Aleksey I. Noskov +3
The nature of enhanced photoemission in disordered and amorphous solids is an intriguing open question. A point in case is light emission in silicon, which occurs when the material…
Photon momentum enabled light absorption in bulk silicon
Sergey S. Kharintsev, Aleksey I. Noskov, Elina I. Battalova +6
Photons do not carry sufficient momentum to induce indirect optical transitions in semiconducting materials such as silicon, necessitating the assistance of lattice phonons to cons…
Light-controlled multi-phase structuring of perovskite crystal enabled by thermoplasmonic metasurface
Sergey S. Kharintsev, Elina I. Battalova, Timur A. Mukhametzyanov +5
Halide perovskites belong to an important family of semiconducting materials with unique electronic properties that enable a myriad of applications, especially in photovoltaics and…
Spectral imaging at high-definition and high speed in the mid-infrared
David Knez, Benjamin W. Toulson, Anabel Chen +4
Spectral imaging in the mid-infrared (MIR) range provides simultaneous morphological and chemical information of a wide variety of samples. However, current MIR technologies strugg…
Enhancement of molecular coherent anti-Stokes Raman scattering with silicon nano-antennas
Shamsul Abedin, Yong Li, Abid Anjum Sifat +2
Surface-enhanced coherent anti-Stokes Raman scattering (SE-CARS) takes advantage of surface plasmon resonances supported on metallic nanostructures to amplify the coherent Raman re…
Force Detection of Electromagnetic Beam Chirality at the Nanoscale
Abid Anjum Sifat, Filippo Capolino, Eric O. Potma
Many nanophotonic applications require precise control and characterization of electromagnetic field properties at the nanoscale. The chiral properties of the field are among its k…
Photoinduced Magnetic Force Microscopy: Enabling Direct and Exclusive Detection of Optical Magnetism
Jinwei Zeng, Mohammad Albooyeh, Mohsen Rajaei +4
Modern optical nano-elements pursue ever-smaller sizes and individualized functionalities. Those elements that can efficiently manipulate the magnetic field of light boast promisin…
High-speed 2D and 3D mid-IR imaging with an InGaAs camera
Eric O. Potma, David Knez, Martin Ettenberg +4
Recent work on mid-infrared (MIR) detection through the process of non-degenerate two-photon absorption (NTA) in semiconducting materials has shown that wide-field MIR imaging can…
Rapid chemically selective 3D imaging in the mid-infrared with a Si-based camera
Eric O. Potma, David Knez, Yong Chen +7
The emerging technique of mid-infrared optical coherence tomography (MIR-OCT) takes advantage of the reduced scattering of MIR light in various materials and devices, enabling tomo…
Simple all-optical method for in situ detection of ultralow amounts of ammonia
Yuanchao Liu, Tristan Asset, Yechuan Chen +5
As a key precursor for nitrogenous compounds and fertilizer, ammonia affects our lives in numerous ways. Rapid and sensitive detection of ammonia is essential, both in environmenta…
Infrared chemical imaging through nondegenerate two-photon absorption in silicon-based cameras
David Knez, Adam M. Hanninen, Richard C. Prince +2
Chemical imaging based on mid-infrared (MIR) spectroscopic contrast is an important technique with a myriad of applications, including biomedical imaging and environmental monitori…
Nanoscale spectroscopic studies of two different physical origins of the tip-enhanced force: dipole and thermal
Junghoon Jahng, Sung Park, Will A. Morrison +4
When light illuminates the junction formed between a sharp metal tip and a sample, different mechanisms can con-tribute to the measured photo-induced force simultaneously. Of parti…
Dyadic Green's function formalism for photo-induced forces in tip-sample nanojunctions
Faezeh Tork Ladani, Eric O. Potma
A comprehensive theoretical analysis of photo-induced forces in an illuminated nanojunction, formed between an atomic force microscopy tip and a sample, is presented. The formalism…
Eigenmodes of a quartz tuning fork and their application to photo-induced force microscopy
Bongsu Kim, Junghoon Jahng, Ryan Muhammad Khan +2
We examine the mechanical eigenmodes of a quartz tuning fork (QTF) for the purpose of facilitat- ing its use as a probe for multi-frequency atomic force microscopy (AFM). We perfor…
Effect of Scatterering on Coherent Anti-Stokes Raman Scattering (CARS) signals
Janaka C. Ranasinghesagara, Giuseppe de Vito, Vincenzo Piazza +2
We develop a computational framework to examine the factors responsible for scattering-induced distortions of coherent anti-Stokes Raman scattering (CARS) signals in turbid samples…
Seeing the vibrational breathing of a single molecule through time-resolved coherent anti-Stokes Raman scattering
Steven Yampolsky, Dmitry A. Fishman, Shirshendu Dey +4
The motion of chemical bonds within molecules can be observed in real time, in the form of vibrational wavepackets prepared and interrogated through ultrafast nonlinear spectroscop…