Zobrazeno 1 - 10
of 284
pro vyhledávání: '"Menon, Rajesh P."'
We present a widefield fluorescence microscope that integrates an event-based image sensor (EBIS) with a CMOS image sensor (CIS) for ultra-fast microscopy with spectral distinction capabilities. The EBIS achieves temporal resolution of $\sim10\thinsp
Externí odkaz:
http://arxiv.org/abs/2410.15552
We posit that inconsistent interpretations of experimental data have led to inaccurate claims on metalens focusing efficiencies. By performing a meta-analysis,we show that extraordinary claims of high focusing efficiency at high numerical apertures a
Externí odkaz:
http://arxiv.org/abs/2409.14690
We laser cool a centimeter-scale torsion pendulum to a temperature of 10 mK (average occupancy of 6000 phonons) starting from room temperature (equivalent to $2\times 10^8$ phonons). This is achieved by optical radiation pressure forces conditioned o
Externí odkaz:
http://arxiv.org/abs/2409.02275
Autor:
Majumder, Apratim, Meem, Monjurul, del Cueto, Fernando Gonzalez, Guevara-Vasquez, Fernando, Qadri, Syed N., Santiago, Freddie, Menon, Rajesh
We present a novel high-definition (HD) snapshot diffractive spectral imaging system utilizing a diffractive filter array (DFA) to capture a single image that encodes both spatial and spectral information. This single diffractogram can be computation
Externí odkaz:
http://arxiv.org/abs/2406.17302
We demonstrate a high-NA (0.88), ultra-low-f-number (f/0.2714), multi-wavelength (480nm, 550nm and 650nm) multilevel diffractive MicroLens Array (MLA) using inverse design. Each microlens in the array is close-packed with diameter of 70 {\mu}m and fo
Externí odkaz:
http://arxiv.org/abs/2404.11573
Autor:
Pollak, Anton, Menon, Rajesh
Publikováno v:
Optics Express Vol. 32, Issue 19 (2024), pp. 33852-33860
Image-to-Image translation (I2I) is a subtype of Machine Learning (ML) that has tremendous potential in applications where two domains of images and the need for translation between the two exist, such as the removal of fog. For example, this could b
Externí odkaz:
http://arxiv.org/abs/2312.02344
The radiation pressure force and torque on a one-dimensional bi-grating composed of a Si-SiO_2 high contrast binary metagrating is analyzed for the purpose of stable beam riding whereupon a high power laser having an expanding Gaussian irradiance dis
Externí odkaz:
http://arxiv.org/abs/2303.06793
Autor:
Yessenov, Murat, Mhibik, Oussama, Mach, Lam, Hayward, Tina M., Menon, Rajesh, Glebov, Leonid, Divliansky, Ivan, Abouraddy, Ayman F.
Space-time wave packets (STWPs) are pulsed fields in which a strictly prescribed association between the spatial and temporal frequencies yields surprising and useful behavior. However, STWPs to date have been synthesized using bulky free-space optic
Externí odkaz:
http://arxiv.org/abs/2212.12091
Autor:
Hall, Layton A., Romer, Miguel A., Turo, Bryan L., Hayward, Tina M., Menon, Rajesh, Abouraddy, Ayman F.
We report on the diffraction-free propagation of space-time wave packets (STWPs) -- a class of propagation-invariant pulsed beams -- for $\sim\!1$ km in an open-air laser range in a low-turbulence scenario. Making use of $\approx\!100$-fs pulses (ban
Externí odkaz:
http://arxiv.org/abs/2209.03309
Recent theoretical work suggested upper bounds on the operating bandwidths of flat lenses. Here, we show how these bounds can be circumvented via a multi-level diffractive lens (MDL) of diameter = 100 mm, focal length = 200 mm, device thickness = 2.4
Externí odkaz:
http://arxiv.org/abs/2112.15157