Abstract

This study investigates a spatially band-tunable color-cone lasing emission (CCLE) based on a dye-doped cholesteric liquid crystal with a photoisomerizable chiral dopant (IBM). Experimental results show that the lasing band of the formed CCLE of the cell with a photoinduced pitch gradient can be spatially tuned among various color regions by adjusting the pumped position of the cell. The spatially band tunability of the laser results from the UV-irradiation-induced decrease of the helical twisting power of IBM via transcis isomerization, accordingly shrinking the pitch of the cholesteric-liquid-crystal host. The total spatially tunable wavelength range for the laser exceeds 100nm.

© 2010 Optical Society of America

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2009 (1)

2008 (1)

M.-Y. Jeong, H. Choi, and J. W. Wu, Appl. Phys. Lett. 92, 051108 (2008).
[CrossRef]

2007 (1)

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

2006 (1)

Y. Huang, Y. Zhou, and S.-T. Wu, Appl. Phys. Lett. 88, 011107 (2006).
[CrossRef]

2005 (1)

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

1998 (1)

Barberi, R.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Bartolino, R.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Chang, S.-H.

Chanishvili, A.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Chilaya, G.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Choi, H.

M.-Y. Jeong, H. Choi, and J. W. Wu, Appl. Phys. Lett. 92, 051108 (2008).
[CrossRef]

Cipparrone, G.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Fan, B.

Fuh, Andy Y.-G.

Genack, A. Z.

Gimenez, R.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Huang, S.-Y.

Huang, Y.

Y. Huang, Y. Zhou, and S.-T. Wu, Appl. Phys. Lett. 88, 011107 (2006).
[CrossRef]

Ishikawa, K.

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

Jeong, M.-Y.

M.-Y. Jeong, H. Choi, and J. W. Wu, Appl. Phys. Lett. 92, 051108 (2008).
[CrossRef]

Ji, T.-D.

Kopp, V. I.

Kuo, C.-T.

Lee, C.-R.

Lin, K.-L.

Lin, S.-H.

Lo, K.-Y.

Mazzulla, A.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Mo, T.-S.

Oriol, L.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Petriashvili, G.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Pinol, M.

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Sonoyama, K.

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

Takanishi, Y.

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

Takezoe, H.

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

Vithana, H. K. M.

Wu, J. W.

M.-Y. Jeong, H. Choi, and J. W. Wu, Appl. Phys. Lett. 92, 051108 (2008).
[CrossRef]

Wu, S.-T.

Y. Huang, Y. Zhou, and S.-T. Wu, Appl. Phys. Lett. 88, 011107 (2006).
[CrossRef]

Yeh, H.-C.

Zhou, Y.

Y. Huang, Y. Zhou, and S.-T. Wu, Appl. Phys. Lett. 88, 011107 (2006).
[CrossRef]

Appl. Phys. Lett. (3)

A. Chanishvili, G. Chilaya, G. Petriashvili, R. Barberi, R. Bartolino, G. Cipparrone, A. Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, Appl. Phys. Lett. 86, 051107 (2005).
[CrossRef]

Y. Huang, Y. Zhou, and S.-T. Wu, Appl. Phys. Lett. 88, 011107 (2006).
[CrossRef]

M.-Y. Jeong, H. Choi, and J. W. Wu, Appl. Phys. Lett. 92, 051108 (2008).
[CrossRef]

Jpn. J. Appl. Phys. (1)

K. Sonoyama, Y. Takanishi, K. Ishikawa, and H. Takezoe, Jpn. J. Appl. Phys. 46, L874 (2007).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

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Figures (4)

Fig. 1
Fig. 1

(a) Illustration of the variation of the transmittance of the UV light via the neutral density filter (NDF) with the detected position ( x = 0 40 mm ) of the NDF. (b) Following the irradiation of the UV light ( 3 mW cm 2 for 160 s ) via the NDF on the cell, a pitch gradient can form in the DDCLC cell. (c) A colored reflection pattern is generated by the illumination of a white-light source on the cell with a pitch gradient.

Fig. 2
Fig. 2

Spatially tunable lasing patterns distributed from long- to short-wavelength region at pumped positions of x = ( a ) 0, (b) 12, (c) 21, (d) 25, (e) 29, (f) 33, and (g) 39 mm of the DDCLC cell with a pitch gradient.

Fig. 3
Fig. 3

Detailed lasing spectra of the obtained lasing patterns and the corresponding reflection spectra measured at θ = 0 ° 40 ° at positions of x = ( a ) 0, (b) 12, (c) 21, (d) 25, (e) 29, (f) 33, and (g) 39 mm of the DDCLC cell with a pitch gradient. (h) Variations of the wavelength of the lasing signals at the long-wavelength edge in the obtained lasing patterns at various oblique angles (0°–40°) with the pumped position ( x = 0 39 mm ) of the cell with a pitch gradient.

Fig. 4
Fig. 4

(a) Chemical structures of IBM at rod-like trans- and bent cis-states. (b) Variation of the measured absorption spectra ( 250 500 nm ) of IBM in ZLI2293 (without doping laser dyes) in the isotropic state with the UV irradiated time ( 0 600 s ) at a fixed intensity of 3 mW cm 2 .

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