Preface to the Sixth Edition
The field of integrated optics has changed considerably in the past 7 years. The
dimensions of photonic devices to be integrated have decreased by several orders
of magnitude. Previously, the topics covered in chapters of this book might be
described as belonging to the field of microphotonics, since they involved photons of
light interacting with physical structures having dimensions mostly on the order of
micrometers. The two exceptions were gratings and quantum wells, some of which
had periodicity on the order of 100 nm. As fabrication techniques have progressed
it has become possible to produce nanometer-sized structures such as quantum
wires, quantum dots, holographic optical elements (HOEs), and photonic crystals
(PhCs). These new devices have greatly changed both the size and performance of
integrated-optic circuits.
In response to these new developments, a new chapter has been added to this sixth
edition: Nanophotonics. The important topics of confinement of photons and elec-
trons, photonic crystals and nanophotonic devices are covered in this new chapter.
Techniques for fabricating and evaluating nanostructures are also described. All the
other chapters have also been updated to include new developments and literature
references. Additional practice problems have been added to all chapters, and an
updated booklet of problem solutions is available.
Newark, DE
March 2009 R.G. Hunsperger
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