High-responsivity operation of quantum cascade detectors at 9 µm.

Quantum cascade detectors (QCDs) are devices operating at zero external bias with a low dark-current. They show linear detection and high saturation intensities, making them suitable candidates for heterodyne detection in long-wave infrared (LWIR) free space optical communication systems. We present an approach to mitigate the performance limitation at long wavelengths, by a comparison of similar single and multi-period QCDs for optimizing their responsivity and noise behaviour. Our InGaAs/InAlAs/InP ridge QCDs are designed for operation at λ = 9.124 µm. Optical waveguide simulations support the accurate optical characterization. A detailed device analysis reveals room-temperature responsivities of 111 mA/W for the 15-period and 411 mA/W for the single-period device.

Clotrimazole troches: a new therapeutic approach to oral candidiasis.

To ascertain the topical effectiveness of clotrimazole in oral candidiasis, a troche form was administered to 12 patients suffering from longstanding infection. One-half of the patients took one 10 mg troche and the other half of the patients one 50 mg troche, ten times a day. The troches were not chewed, but were retained in the mouth until completely dissolved. The impressive clinical and mycological response to this treatment as well as the lack of toxicity strongly indicate that further trials are warranted.

Genital candidiasis: topical management with clotrimazole.

Clotrimazole was administered in the form of 100 mg tablets to patients with vaginal candidiasis, and in the form of a 1% solution to patients with cutaneous candidiasis of the genital and perigenital areas. The clinical and mycological response observed and the excellent tolerance and lack of side effects indicate that clotrimazole may be proposed as a treatment for candidiasis.