steady-state CD measurement of Δ- and Λ-Ru complex [11]. Here, we describe our
recent progress for TRCD experiments with elliptically polarized measurements.
15.3 Jones Vector Description of CD Measurement
with Elliptically Polarized Light
The CD measurement apparatus discussed here is schematically shown in Fig. 15.1.
In Fig. 15.1, light from Xe lamp is directed to the first glan-laser prism to yield
linearly polarized light. To produce elliptically polarized light, linearly polarized
light is directed into the home-built retarder, in which a θ-stage is mounted to control
the azimuth (θ). Note that the azimuth is defined as the angle between the fast axis of
the home-built retarder and polarized plane of the introduced linearly polarized light
proceeding in the counterclockwise direction. Usually, the polarized plane is set
vertically; thus, the long axis of the elliptical polarization is also in the vertical
direction. We can produce left- and right-handed elliptically polarized light by
controlling the azimuth θ, in particular +θ for left-handed polarized light and Àθ
Fig. 15.1 Top view of the setup for TRCD measurement system. Experimental coordination axis is
also shown in the figure. Light source: Xe lamp (Energetiq Technology Inc. LDLS EQ-99) for CD
spectrum measurement. Light source: He–Ne laser (OptoSigma 05-LHP-121) for time-course CD
measurement. L1, L2, L3: Lens. AP: Aperture. GP: Glan-laser prism (THORLABS Inc., GL15-A).
M: Mirror. Retarder: quartz plate: 2 mm width, diameter 30 mm. Rotation stage: THORLABS Inc.,
Ø1
00 Motorized precision rotation stage, PRM1/MZ8. I/I+CCD: Image-intensifier and Multichannel
analyzer (Unisoku, MD200). Monochrometer: Acton Research Corporation, SpectraPro-150, slit
width 0.5 mm. PC: Personal computer. LCU: Laser control unit. Nd:YAG: Nd:YAG laser (continuum, Surelite, 6 nm FWHM, 355 nm, 10 Hz, 0.01 J). Stage controller: K-cube brushed DC servo
motor controller (THORLABS Inc., KDC101)
15 Transient Circular Dichroism Approach to Chirality Detection in Dark. . .
329
recent progress for TRCD experiments with elliptically polarized measurements.
15.3 Jones Vector Description of CD Measurement
with Elliptically Polarized Light
The CD measurement apparatus discussed here is schematically shown in Fig. 15.1.
In Fig. 15.1, light from Xe lamp is directed to the first glan-laser prism to yield
linearly polarized light. To produce elliptically polarized light, linearly polarized
light is directed into the home-built retarder, in which a θ-stage is mounted to control
the azimuth (θ). Note that the azimuth is defined as the angle between the fast axis of
the home-built retarder and polarized plane of the introduced linearly polarized light
proceeding in the counterclockwise direction. Usually, the polarized plane is set
vertically; thus, the long axis of the elliptical polarization is also in the vertical
direction. We can produce left- and right-handed elliptically polarized light by
controlling the azimuth θ, in particular +θ for left-handed polarized light and Àθ
Fig. 15.1 Top view of the setup for TRCD measurement system. Experimental coordination axis is
also shown in the figure. Light source: Xe lamp (Energetiq Technology Inc. LDLS EQ-99) for CD
spectrum measurement. Light source: He–Ne laser (OptoSigma 05-LHP-121) for time-course CD
measurement. L1, L2, L3: Lens. AP: Aperture. GP: Glan-laser prism (THORLABS Inc., GL15-A).
M: Mirror. Retarder: quartz plate: 2 mm width, diameter 30 mm. Rotation stage: THORLABS Inc.,
Ø1
00 Motorized precision rotation stage, PRM1/MZ8. I/I+CCD: Image-intensifier and Multichannel
analyzer (Unisoku, MD200). Monochrometer: Acton Research Corporation, SpectraPro-150, slit
width 0.5 mm. PC: Personal computer. LCU: Laser control unit. Nd:YAG: Nd:YAG laser (continuum, Surelite, 6 nm FWHM, 355 nm, 10 Hz, 0.01 J). Stage controller: K-cube brushed DC servo
motor controller (THORLABS Inc., KDC101)
15 Transient Circular Dichroism Approach to Chirality Detection in Dark. . .
329