Parker, B; Marra, G; Johnson, L A M; Margolis, H S; Webster, S A; Wright, L; Lea, S N; Gill, P; Bayvel, P* (2014) Transportable cavity-stabilised laser system for optical carrier frequency transmission experiments. Appl. Opt., 53 (35). pp. 8157-8166.

King, S A; Godun, R M; Webster, S A; Margolis, H S; Johnson, L A M; Szymaniec, K; Baird, P E G*; Gill, P (2012) Absolute frequency measurement of the 2S- 1/2 - 2F-2 7/2) electric octupole transition in a single ion of Yb-171(+) with 10(-15) fractional uncertainty. New J. Phys., 14 (1). 013045

Webster, S A; Gill, P (2011) Force-insensitive optical cavity. Opt. Lett., 36 (18). pp. 3572-3574.

Webster, S A; Godun, R; King, S; Huang, G L; Walton, B; Tsatourian, V; Margolis, H S; Lea, S N; Gill, P (2010) Frequency measurement of the S-2(1/2)-D-2(3/2) electric quadrupole transition in a single Yb-171(+) ion. IEEE Trans. Ultrason. Feroelectr. Freq. Control, 57 (3). pp. 592-599.

Hosaka, K*; Webster, S A; Stannard, A*; Walton, B R; Margolis, H S; Gill, P (2009) Frequency measurement of the 2S1/2 - 2D3/2 electric quadrupole transition in a single 171Yb+ ion. Phys. Rev. A, 79 (3). 033403

Webster, S A; Oxborrow, M; Pugla, S; Milo, J*; Gill, P (2008) Thermal-noise-limited optical cavity. Phys. Rev. A, 77 (3). 033847

Webster, S A; Oxborrow, M; Pugla, S; Millo, J*; Gill, P (2008) Thermal-noise-limited optical cavity. Phys. Rev. A, 77 (3). 033847

Lea, S N; Webster, S A; Barwood, G P (2007) Polarisabilities and blackbody shifts in Sr+ and Yb+. In: Proceedings of the 20th European Frequency and Time Forum, 27-30 March 2006, PTB, Germany.

Hosaka, K; Webster, S A; Stannard, A; Margolis, H S; Lea, S N; Walton, B R; Gill, P (2006) An 171Yb+ optical frequency standard at 467 nm. In: CPEM 2006 Conference on Precision Electromagnetic Measurements, 9-14 July 2006, Torino, Italy.

Hosaka, K; Webster, S A; Stannard, A; Margolis, H S; Lea, S N; Walton, B R; Gill, P (2006) An 171Yb+ optical frequency standard at 467 nm. In: CPEM 2006 Conference on Precision Electromagnetic Measurements, 9-14 July 2006, Torino, Italy.

Webster, S A; Blythe, P E; Hosaka, K; Barwood, G P; Gill, P (2004) Systematics shifts of the 467 nm electric octupole transition in 171 Yb+. NPL Report. CBTLM 31

Webster, S A; Hosaka, K; Blythe, P J; Margolis, H S; Lea, S N; Huang, G; Rowley, W R C; Gill, P (2003) Femtosecond comb measurements of the 467 nm electric octupole transition in 171Yb+. NPL Report. CBTLM 28

Blythe, P J; Webster, S A; Margolis, H S; Lea, S N; Huang, G; Choi, S-K; Rowley, W R C; Gill, P; Windeler, R S* (2003) Sub-kilohertz absolute frequency measurement of the 467 nm electric octupole transition in 171Yb+. Phys. Rev. A, At. Mol. Opt. Phys., 67 (2). 020501

Blythe, P J; Webster, S A; Margolis, H S; Lea, S N; Huang, G; Choi, S-K*; Rowley, W R C; Gill, P; Windeler, R S* (2003) Sub-kilohertz absolute frequency measurements of the 467 nm electric octuple transition in 171Yb+. Phys. Rev. A, At. Mol. Opt. Phys., 67. 020501

Blythe, P J; Webster, S A; Hosaka, K; Gill, P (2003) Systematic frequency shifts of the 467 nm electric octupole transition in 171Yb+. J. Phys. B, At. Mol. Phys., 36 (5). pp. 981-989.

Margolis, H S; Barwood, G P; Blythe, P J; Gill, P; Hosaka, K; Huang, G; Klein, H A; Lea, S N; Webster, S A (2003) Trapped ion optical Frequency standards and metrology. In: Digest of LEOS Summer Topical Meeting on Photonic Time/Frequency Measurement and Control, 14-16 July 2003, Vancouver, Canada.

Gill, P; Barwood, G P; Klein, H A; Huang, G; Webster, S A; Blythe, P J; Hosaka, K; Lea, S N; Margolis, H S (2003) Trapped ion optical frequency standards. Meas. Sci. Technol., 14 (8). pp. 1174-1186.

Lea, S N; Margolis, H S; Huang, G; Barwood, G P; Klein, H A; Blythe, P J; Webster, S A; Rowley, W R C; Gill, P; Windeler, R S* (2002) Femtosecond comb measurements of optical frequency standards at NPL. In: IEEE-LEOS 2002 15th Annual Meeting of the IEEE Lasers and Electo-Optics Society., 10-14 November 2002, Glasgow, UK.

Lea, S N; Margolis, H S; Huang, G; Rowley, W R C; Henderson, D; Barwood, G P; Klein, H A; Webster, S A; Blythe, P; Gill, P (2002) Femtosecond optical frequency comb measurements of lasers stabilised to transitions in 88Sr+, 171Yb+ and I2 at NPL. In: Proceedings of the 6th Symposium on Frequency Standards and Metrology, 9-14 September 2001, University of St Andrews, Fife, Scotland, UK.

Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Gill, P (2002) Kilohertz resolution spectroscopy of the 2D1/2-2F7/2 electric octupole transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 65 (5). 052501

Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Gill, P (2002) Kilohertz resolution spectroscopy of the 2S1/2-1F7/2 electric octupole transition in a single 171Yb+ ion. Phys. Rev. A, At. Mol. Opt. Phys., 65 (5). 052501

Oxborrow, M; Webster, S A; Gill, P (2002) Stability of ND:YAG 'flywheel' lasers locked to ultra-high-finesse etalons made from either ULE or mono-crystalline-sapphire. In: Proceedings of the 6th Symposium on Frequency Standards and Metrology, 9-14 September 2001, University of St Andrews, Fife, Scotland, UK.

Webster, S A; Taylor, P; Roberts, M; Barwood, G P; Blythe, P; Gill, P (2002) A frequency standard using the 2S1/2 - 2F5/2 octupole transition in 171Yb+. In: Proceedings of the 6th Symposium on Frequency Standards and Metrology, 9-14 September 2001, University of St Andrews, Fife, Scotland, UK.

Taylor, P; Webster, S A; Roberts, M; Rowley, W R C; Barwood, G P; Gill, P (2001) Progress towards a single ytterbium ion optical clock. Proc. SPIE - Int. Soc. Opt. Eng., 4269. pp. 155-169.