Chapter 14
Principles and Applications of Circularly
Polarized Luminescence Spectrophotometer
Satoko Suzuki
Abstract Materials that exhibit circularly polarized light characteristics are finding
an increasing range of applications, such as liquid crystal display backlights, threedimensional displays, holographic displays, plant growth control illumination, security systems for optical communications, and printing. In this chapter, we will
describe the basic principles of circularly polarized luminescence (CPL) spectroscopy, the instruments used to measure CPL signals, including optical systems and
signal acquisition methods in commercially available CPL instruments, and also
methods for calibrating such equipment. Example measurements are presented for
camphor and camphorquinone, which are long-established CPL samples, in addition
to lanthanoid complexes that are promising CPL luminescent materials, biopolymers
that are highly sensitive to circularly polarized light, and solid samples that have
been attracting attention in recent years.
14.1 Introduction
Circular dichroism (CD) spectroscopy is widely used in the study of optically active
substances. However, in recent years, circularly polarized luminescence (CPL)
spectroscopy has also attracted a great deal of attention. The two methods are
complimentary to each other. Materials that exhibit circularly polarized luminescence are currently being actively investigated for applications in fields such as
liquid crystal display backlights, three-dimensional (3D) displays, holographic displays, light sources for controlling plant growth, and security systems for optical
communications and printing. It is therefore important to identify molecules that
emit one-handed circularly polarized light (large g lum ) with a high quantum yield.
Consequently, there is a need for the development of highly sensitive CPL measuring instruments.
S. Suzuki (*)
Jasco Corporation, Tokyo, Japan
e-mail: satoko.suzuki@jasco.co.jp
© Springer Nature Singapore Pte Ltd. 2020
T. Mori (ed.), Circularly Polarized Luminescence of Isolated Small Organic
Molecules, https://doi.org/10.1007/978-981-15-2309-0_14
309
Principles and Applications of Circularly
Polarized Luminescence Spectrophotometer
Satoko Suzuki
Abstract Materials that exhibit circularly polarized light characteristics are finding
an increasing range of applications, such as liquid crystal display backlights, threedimensional displays, holographic displays, plant growth control illumination, security systems for optical communications, and printing. In this chapter, we will
describe the basic principles of circularly polarized luminescence (CPL) spectroscopy, the instruments used to measure CPL signals, including optical systems and
signal acquisition methods in commercially available CPL instruments, and also
methods for calibrating such equipment. Example measurements are presented for
camphor and camphorquinone, which are long-established CPL samples, in addition
to lanthanoid complexes that are promising CPL luminescent materials, biopolymers
that are highly sensitive to circularly polarized light, and solid samples that have
been attracting attention in recent years.
14.1 Introduction
Circular dichroism (CD) spectroscopy is widely used in the study of optically active
substances. However, in recent years, circularly polarized luminescence (CPL)
spectroscopy has also attracted a great deal of attention. The two methods are
complimentary to each other. Materials that exhibit circularly polarized luminescence are currently being actively investigated for applications in fields such as
liquid crystal display backlights, three-dimensional (3D) displays, holographic displays, light sources for controlling plant growth, and security systems for optical
communications and printing. It is therefore important to identify molecules that
emit one-handed circularly polarized light (large g lum ) with a high quantum yield.
Consequently, there is a need for the development of highly sensitive CPL measuring instruments.
S. Suzuki (*)
Jasco Corporation, Tokyo, Japan
e-mail: satoko.suzuki@jasco.co.jp
© Springer Nature Singapore Pte Ltd. 2020
T. Mori (ed.), Circularly Polarized Luminescence of Isolated Small Organic
Molecules, https://doi.org/10.1007/978-981-15-2309-0_14
309