Abstract: Incident infrared radiation of a particular polarity is sensed by a set of Niobium Trisulfide (NbS3) crystal fibers which are fixed in parallel upon a substrate. In order to detect unpolarized or variously polarized infrared radiation, plural substrates, each having associated therewith its own such set of parallel fibers, can be coplanarly arrayed whereby different angles are described by different sets of parallel fibers; for instance, 0-degree, 45-degree, 90-degree and 135-degree angles can each be described by one or more sets of parallel fibers within a given array. The crystalline fibrous Niobium Trisulfide material is not a semiconductor material but rather is a “charge density wave” material having special attributes. The invention thus offers more economical operability at much higher temperatures when compared with conventional infrared-photosensitive materials, and is especially suitable for detecting midwavelength infrared radiation.