WebWorking mechanism of the dynamic dual-mode modulation. (a) The solid line represents the calculated penetration depth of silicon versus the wavelength; the blue star and red triangle represent the penetration depths of silicon for pump light at 515 and 1030 nm, respectively; the left (right) inset depicts the perturbed region [highlighted by red (blue) color] inside … WebAug 15, 2024 · Active chiral hybrid metasurfaces for dynamic terahertz wavefront modulation (a) The unit cells 0–7 which are rotated in a step of 22.5° with Pancharatnam-Berry phases. (b) Reflection amplitudes and phase shifts of the units in “on” and “off” states. (c), (d) Farfield patterns of the metasurfaces with different Fermi levels of graphene.
Austin Howes - Principal Research Scientist - Northrop Grumman
WebApr 9, 2024 · Tunable metasurfaces exploiting electro-optical effects have been proposed for dynamic wavefront engineering delivering exceptionally high modulation frequencies, up to the GHz range. In this section, we propose an ultra-fast dynamic wavefront shaping metasurface operating in reflection using an electro-optic III–V MQW modulator. [ 63 ] WebJan 22, 2024 · In [10, 11], the authors experimentally demonstrated the integration of a PCM with hybrid metal-dielectric metasurfaces to control the amplitude, phase, and polarization of the incident optical ... can spina bifida be mild
Optically controlled dielectric metasurfaces for dynamic dual …
WebAbout the Role: Under the general supervision of the Director of Scientific Programs, the Scientific Program Manager will manage the day-to-day operations of specific science related initiatives ... WebApr 10, 2024 · In contrast to wired electrical control scheme, optical control is a non-contact remotely tuning method that provides more possibilities to release these limitations. 84-95 Figure 1 shows conceptually the light-controlled programmable metasurfaces, on which microwaves can be controlled and modulated by incident light in real time, offering a ... WebAug 31, 2024 · Dynamic properties play a vital role in modern optical devices, including light detection and ranging systems, display devices, and digital cameras. Active metasurfaces provide an attractive scheme for the miniaturization and integration of dynamic optical systems compared with traditional bulk optical devices. Phase transition materials are … flare for bear protection