We demonstrate antenna-coupled spintronic terahertz (THz) emitters excited by 1550 nm, 90 fs laser pulses. Antennas are employed to optimize THz outcoupling and frequency coverage of ferromagnetic/nonmagnetic metallic spintronic structures. We directly compare the antenna-coupled devices to those without antennas. Using a 200 lm H-dipole antenna and an ErAs:InGaAs photoconductive receiver, we obtain a 2.42-fold larger THz peak-peak signal, a bandwidth of 4.5 THz, and an increase in the peak dynamic range (DNR) from 53 dB to 65 dB. A 25 lm slotline antenna offered 5 dB larger peak DNR and a bandwidth of 5 THz. For all measurements, we use a comparatively low laser power of 45 mW from a commercial fiber-coupled system that is frequently employed in table-top THz time-domain systems.

Purpose: This study examines treatment-based outcomes of endophthalmitis due to antivascular endothelial growth factor (anti-VEGF) intravitreal injection and its effect on subsequent management of neovascular disease. Methods: A retrospective multicenter study was conducted of 157 patients with a diagnosis of endophthalmitis following anti-VEGF intravitreal injection at 10 major ophthalmic centers. Results: The median number of injections before endophthalmitis was 10 (range, 1 to 84 injections). Initial treatment with tap and inject with or without subsequent vitrectomy trended toward smaller visual acuity changes from baseline (4 ETDRS [Early Treatment Diabetic Retinopathy Study] letter difference vs 19 ETDRS letter difference) compared with initial vitrectomy, but the difference was not statistically significant. There was no significant change in medication choice among injections after endophthalmitis. There was a statistically significant shift away from regular interval (1- to 2-month) injections and a shift toward treat-and-extend and as-needed injection algorithms. Conclusions: The visual outcomes were not significantly different between patients who initially underwent tap and injection of antibiotics and those who underwent vitrectomy. There was no significant change in medication choice before and after endophthalmitis but there was a shift toward lower-frequency injection algorithms after postintravitreal injection endophthalmitis compared with prior.

Most of the scattered light in eyes implanted with a KPro originates from the surrounding hazy corneal graft. The standard addition of a backplate reduces light scatter. There was no difference in forward light scatter between the aphakic and the pseudophakic KPro.