부산대학교 도서관

Terahertz (THz) and sub-THz frequency emitter-detector technology is receiving increasing attention because of key apphcations in several fields. In particular, ultrafast THz receivers are desired for compact, ultrafast spectroscopy and communication systems. While most of the available THz detectors (thermal, FET …) are currently limited in response time by slow thermal processes and/or by the read-out electronics, quantum well infrared photodetectors (QWIP) are excellent candidates given their intrinsic ps-range response [1]. The key to true ultrafast response is an aggressive reduction in device size, well below the typical diffraction-limited optical cavities [2].