Markus Hehlen
Markus Hehlen
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Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems
M Pollnau, DR Gamelin, SR Lüthi, HU Güdel, MP Hehlen
Physical Review B 61 (5), 3337, 2000
Hexagonal sodium yttrium fluoride based green and blue emitting upconversion phosphors
KW Krämer, D Biner, G Frei, HU Güdel, MP Hehlen, SR Lüthi
Chemistry of materials 16 (7), 1244-1251, 2004
50th anniversary of the Judd–Ofelt theory: An experimentalist's view of the formalism and its application
MP Hehlen, MG Brik, KW Krämer
Journal of Luminescence 136, 221-239, 2013
Spectroscopic properties of Er 3+-and Yb 3+-doped soda-lime silicate and aluminosilicate glasses
MP Hehlen, NJ Cockroft, TR Gosnell, AJ Bruce
Physical Review B 56 (15), 9302, 1997
Constraining the Evolution of the Fundamental Constants <?format ?>with a Solid-State Optical Frequency Reference Based on the Nucleus
WG Rellergert, D DeMille, RR Greco, MP Hehlen, JR Torgerson, ...
Physical review letters 104 (20), 200802, 2010
Cooperative bistability in dense, excited atomic systems
MP Hehlen, HU Güdel, Q Shu, J Rai, S Rai, SC Rand
Physical review letters 73 (8), 1103, 1994
Solid-state optical refrigeration to sub-100 Kelvin regime
SD Melgaard, AR Albrecht, MP Hehlen, M Sheik-Bahae
Scientific reports 6 (1), 20380, 2016
Uniform upconversion in high-concentration Er3+-doped soda lime silicate and aluminosilicate glasses
MP Hehlen, NJ Cockroft, TR Gosnell, AJ Bruce, G Nykolak, J Shmulovich
Optics Letters 22 (11), 772-774, 1997
Local lattice dynamics and the origin of the relaxor ferroelectric behavior
W Dmowski, SB Vakhrushev, IK Jeong, MP Hehlen, F Trouw, T Egami
Physical review letters 100 (13), 137602, 2008
Model of laser cooling in the -doped fluorozirconate glass ZBLAN
MP Hehlen, RI Epstein, H Inoue
Physical Review B—Condensed Matter and Materials Physics 75 (14), 144302, 2007
Cooperative optical bistability in the dimer system Cs3Y2Br9: 10% Yb3+
MP Hehlen, HU Güdel, Q Shu, SC Rand
The American Institute of Physics, 1996
Near-infrared to visible upconversion in Er 3+-doped Cs 3 Lu 2 Cl 9, Cs 3 Lu 2 Br 9, and Cs 3 Y 2 I 9 excited at 1.54 μm
SR Lüthi, M Pollnau, HU Güdel, MP Hehlen
Physical Review B 60 (1), 162, 1999
Site-Selective, Intrinsically Bistable Luminescence of Ion Pairs in
MP Hehlen, A Kuditcher, SC Rand, SR Lüthi
Physical review letters 82 (15), 3050, 1999
First demonstration of an all-solid-state optical cryocooler
MP Hehlen, J Meng, AR Albrecht, ER Lee, A Gragossian, SP Love, ...
Light: Science & Applications 7 (1), 15, 2018
Dynamics of infrared-to-visible upconversion in Cs 3 Lu 2 Br 9: 1% Er 3+
MP Hehlen, G Frei, HU Güdel
Physical Review B 50 (22), 16264, 1994
Upconversion in Er 3+-dimer systems: Trends within the series Cs 3 Er 2 X 9 (X= Cl, Br, I)
MP Hehlen, K Krämer, HU Güdel, RA McFarlane, RN Schwartz
Physical Review B 49 (18), 12475, 1994
Cryogenic optical refrigeration
DV Seletskiy, MP Hehlen, RI Epstein, M Sheik-Bahae
Advances in Optics and Photonics 4 (1), 78-107, 2012
Crystalline electric field effects in : Superconductivity and the influence of Kondo spin fluctuations
AD Christianson, ED Bauer, JM Lawrence, PS Riseborough, NO Moreno, ...
Physical Review B—Condensed Matter and Materials Physics 70 (13), 134505, 2004
Optical spectroscopy of the dimer system Cs3Yb2Br9
MP Hehlen, HU Güdel
The Journal of chemical physics 98 (3), 1768-1775, 1993
Multi-channel laser pump source for optical amplifiers
W Bischel, D Wagner, H Guenther, S Field, M Hehlen, R Tompane, ...
US Patent App. 09/784,687, 2002
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