Unlike laser, spontaneous emission from bulk thermal sources is usually perceived to be incoherent and broadband.
However, when subwavelength microstructures are fabricated on the surface of bulk thermal sources, the radiative
characteristics can be greatly altered. In this paper, a vertical resonant-cavity narrowband thermal emitter, which is based
on the theory of surface wave existing in the forbid band of the truncated one-dimensional photonic crystals, is proposed.
The central wavelength, bandwidth (FWHM) and emittance at its central wavelength are 2μm, 4.3nm and nearly 100%,
respectively. Theory explanation is given, and two types of numerical simulation methods (transfer matrix method
(TMM) and finite difference time domain method (FDTD)) are adopted to simulate this structure. The numerical results
obtained by these two different methods are consistent; therefore, the feasibility of this devised emitter is confirmed.
Integrated visible/infrared dual-band filter array is the key component of compact, lightweight, rigid miniature dual-band
CCD sensing system. Interference cut-off filter array and interference absorbing filter array have been designed for
infrared and visible pass band respectively. A simple, effective and compatible with high temperature deposition process
lift-off technique for striping thick infrared film was investigated. Integrating photolithography, ion beam assisted
electron beam physical vapor deposition and improved lift-off process, dual-band microfilter array with good
performance was fabricated on the same sapphire substrate consecutively. Details of design and fabricating procedure are
elucidated, and experimental results are presented.