Abstract: The present invention proposes an optical band-pass filter with blocked sidebands. The filter comprises a photonic crystal structure based on macroporous silicon having a series of pores defined in the structure. The photonic crystal structure includes a resonator block (BR), comprising at least two periodicity groups (GR1, GR2) between which there is a resonant cavity (CR), wherein the resonant cavity (CR) is adapted to provide a resonance peak in the center of a non-transmitting frequency band of the resonator block (BR); and at least one of a high-pass block (BPA), adapted to block wavelengths below said non-transmitting frequency band; or a low-pass block (BPB), adapted to block wavelengths above said non-transmitting frequency band.

Abstract: A bag comprising a front wall, a back wall and opposite end walls forming an enclosed container. A handle is secured to one of the end walls. The handle is comprised of an upstanding folded portion having oppositely extending flat base portions which extend laterally outwardly from the lower end thereof. The flat base portions are secured to a flat member which is secured to the end wall. The upstanding portion has a hand receiving slip formed therein which is comprised of a generally horizontal slit which has its opposite ends terminating in upwardly and inwardly curved portions. The curved slit portions terminate in tightly curled portions to minimize tearing of the handle and to permit the handle to withstand greater stress.